12520620 has 144 divisors (see below), whose sum is σ = 45776640. Its totient is φ = 2706048.

The previous prime is 12520603. The next prime is 12520643. The reversal of 12520620 is 2602521.

12520620 = 315² + 316² + ... + 409².

12520620 is a `hidden beast` number, since 1 + 25 + 20 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12520593 and 12520602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23679 + ... + 24201.

Almost surely, 2^12520620 is an apocalyptic number.

12520620 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 12520620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22888320).

12520620 is an abundant number, since it is smaller than the sum of its proper divisors (33256020).

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

12520620 is a wasteful number, since it uses less digits than its factorization.

12520620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 12520620 is about 3538.4488126861. The cubic root of 12520620 is about 232.2069843239.

The spelling of 12520620 in words is "twelve million, five hundred twenty thousand, six hundred twenty".