12577220 has 12 divisors (see below), whose sum is σ = 26412204. Its totient is φ = 5030880.

The previous prime is 12577217. The next prime is 12577223. The reversal of 12577220 is 2277521.

It is an interprime number because it is at equal distance from previous prime (12577217) and next prime (12577223).

It can be written as a sum of positive squares in 2 ways, for example, as 9132484 + 3444736 = 3022^2 + 1856^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12577220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12577223) 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, 314411 + ... + 314450.

It is an arithmetic number, because the mean of its divisors is an integer number (2201017).

Almost surely, 2^12577220 is an apocalyptic number.

12577220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12577220 is an abundant number, since it is smaller than the sum of its proper divisors (13834984).

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

12577220 is a wasteful number, since it uses less digits than its factorization.

12577220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628870 (or 628868 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 12577220 is about 3546.4376492475. The cubic root of 12577220 is about 232.5563589430.

The spelling of 12577220 in words is "twelve million, five hundred seventy-seven thousand, two hundred twenty".