12547920 has 240 divisors, whose sum is σ = 49871808. Its totient is φ = 2580480.

The previous prime is 12547891. The next prime is 12547933. The reversal of 12547920 is 2974521.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129312 + ... + 129408.

Almost surely, 2^12547920 is an apocalyptic number.

12547920 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 12547920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24935904).

12547920 is an abundant number, since it is smaller than the sum of its proper divisors (37323888).

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

12547920 is a wasteful number, since it uses less digits than its factorization.

12547920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 12547920 is about 3542.3043347516. The cubic root of 12547920 is about 232.3756300957.

The spelling of 12547920 in words is "twelve million, five hundred forty-seven thousand, nine hundred twenty".