13750420 has 12 divisors (see below), whose sum is σ = 28875924. Its totient is φ = 5500160.

The previous prime is 13750393. The next prime is 13750423. The reversal of 13750420 is 2405731.

It can be written as a sum of positive squares in 2 ways, for example, as 5071504 + 8678916 = 2252^2 + 2946^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13750391 and 13750400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13750423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343741 + ... + 343780.

It is an arithmetic number, because the mean of its divisors is an integer number (2406327).

Almost surely, 2^13750420 is an apocalyptic number.

13750420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13750420 is an abundant number, since it is smaller than the sum of its proper divisors (15125504).

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

13750420 is a wasteful number, since it uses less digits than its factorization.

13750420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687530 (or 687528 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 13750420 is about 3708.1558759038. The cubic root of 13750420 is about 239.5734320966.

The spelling of 13750420 in words is "thirteen million, seven hundred fifty thousand, four hundred twenty".