125345409 has 16 divisors (see below), whose sum is σ = 193855488. Its totient is φ = 70556112.

The previous prime is 125345399. The next prime is 125345417. The reversal of 125345409 is 904543521.

It is not a de Polignac number, because 125345409 - 2⁴ = 125345393 is a prime.

It is a super-2 number, since 2×125345409² = 31422943114754562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125345409.

It is not an unprimeable number, because it can be changed into a prime (125341409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43137 + ... + 45950.

It is an arithmetic number, because the mean of its divisors is an integer number (12115968).

Almost surely, 2^125345409 is an apocalyptic number.

It is an amenable number.

125345409 is a deficient number, since it is larger than the sum of its proper divisors (68510079).

125345409 is an equidigital number, since it uses as much as digits as its factorization.

125345409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89164.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 125345409 is about 11195.7763911218. The cubic root of 125345409 is about 500.4601217793.

The spelling of 125345409 in words is "one hundred twenty-five million, three hundred forty-five thousand, four hundred nine".