312120025 has 12 divisors (see below), whose sum is σ = 442318912. Its totient is φ = 214025040.

The previous prime is 312120023. The next prime is 312120037. The reversal of 312120025 is 520021213.

It is not a de Polignac number, because 312120025 - 2¹ = 312120023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312119990 and 312120008.

It is not an unprimeable number, because it can be changed into a prime (312120023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 891597 + ... + 891946.

Almost surely, 2^312120025 is an apocalyptic number.

312120025 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

312120025 is a deficient number, since it is larger than the sum of its proper divisors (130198887).

312120025 is a wasteful number, since it uses less digits than its factorization.

312120025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783560 (or 1783555 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 312120025 is about 17666.9189447396. The cubic root of 312120025 is about 678.3292497076.

Adding to 312120025 its reverse (520021213), we get a palindrome (832141238).

The spelling of 312120025 in words is "three hundred twelve million, one hundred twenty thousand, twenty-five".