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BaseRepresentation
bin100110001101101111100
32100121201112
410301231330
5310032340
642501152
713433534
oct4615574
92317645
101252220
117858a2
125047b8
1334ac78
142484c4
1519b065
hex131b7c

1252220 has 48 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 451584.

The previous prime is 1252219. The next prime is 1252247. The reversal of 1252220 is 222521.

It is a junction number, because it is equal to n+sod(n) for n = 1252195 and 1252204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9797 + ... + 9923.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

21252220 is an apocalyptic number.

1252220 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 1252220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451520).

1252220 is an abundant number, since it is smaller than the sum of its proper divisors (1650820).

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

1252220 is a wasteful number, since it uses less digits than its factorization.

1252220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1252220 is about 1119.0263625134. The cubic root of 1252220 is about 107.7854680530.

Adding to 1252220 its reverse (222521), we get a palindrome (1474741).

It can be divided in two parts, 12 and 52220, that multiplied together give a triangular number (626640 = T1119).

The spelling of 1252220 in words is "one million, two hundred fifty-two thousand, two hundred twenty".