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BaseRepresentation
bin110010100001…
…110100011000
3220220221201020
4302201310120
511342330340
61151522440
7220405155
oct62416430
926827636
1013245720
117527784
124529420
13298a007
141a8b22c
1512699d0
hexca1d18

13245720 has 128 divisors (see below), whose sum is σ = 43338240. Its totient is φ = 3225600.

The previous prime is 13245709. The next prime is 13245731. The reversal of 13245720 is 2754231.

It is an interprime number because it is at equal distance from previous prime (13245709) and next prime (13245731).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87645 + ... + 87795.

It is an arithmetic number, because the mean of its divisors is an integer number (338580).

Almost surely, 213245720 is an apocalyptic number.

13245720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13245720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21669120).

13245720 is an abundant number, since it is smaller than the sum of its proper divisors (30092520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13245720 is a wasteful number, since it uses less digits than its factorization.

13245720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 13245720 is about 3639.4669939429. The cubic root of 13245720 is about 236.6056930363.

Adding to 13245720 its reverse (2754231), we get a palindrome (15999951).

The spelling of 13245720 in words is "thirteen million, two hundred forty-five thousand, seven hundred twenty".