12507870 has 32 divisors (see below), whose sum is σ = 30754080. Its totient is φ = 3253760.

The previous prime is 12507863. The next prime is 12507881. The reversal of 12507870 is 7870521.

It is a happy number.

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

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3855 + ... + 6314.

It is an arithmetic number, because the mean of its divisors is an integer number (961065).

Almost surely, 2^12507870 is an apocalyptic number.

12507870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12507870 is an abundant number, since it is smaller than the sum of its proper divisors (18246210).

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

12507870 is a wasteful number, since it uses less digits than its factorization.

12507870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10220.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 12507870 is about 3536.6467168774. The cubic root of 12507870 is about 232.1281372013.

The spelling of 12507870 in words is "twelve million, five hundred seven thousand, eight hundred seventy".