345320725 has 12 divisors (see below), whose sum is σ = 450735040. Its totient is φ = 261716400.

The previous prime is 345320713. The next prime is 345320743. The reversal of 345320725 is 527023543.

It is not a de Polignac number, because 345320725 - 2¹³ = 345312533 is a prime.

It is a super-2 number, since 2×345320725² = 238492806229051250, which contains 22 as substring.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 363021 + ... + 363970.

Almost surely, 2^345320725 is an apocalyptic number.

It is an amenable number.

345320725 is a deficient number, since it is larger than the sum of its proper divisors (105414315).

345320725 is a wasteful number, since it uses less digits than its factorization.

345320725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727020 (or 727015 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 31.

The square root of 345320725 is about 18582.8072421795. The cubic root of 345320725 is about 701.5751772833.

The spelling of 345320725 in words is "three hundred forty-five million, three hundred twenty thousand, seven hundred twenty-five".