125315945 has 4 divisors (see below), whose sum is σ = 150379140. Its totient is φ = 100252752.

The previous prime is 125315933. The next prime is 125315951. The reversal of 125315945 is 549513521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81504784 + 43811161 = 9028^2 + 6619^2 .

It is a cyclic number.

It is not a de Polignac number, because 125315945 - 2⁶ = 125315881 is a prime.

It is a super-4 number, since 4×125315945⁴ (a number of 33 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12531590 + ... + 12531599.

It is an arithmetic number, because the mean of its divisors is an integer number (37594785).

Almost surely, 2^125315945 is an apocalyptic number.

It is an amenable number.

125315945 is a deficient number, since it is larger than the sum of its proper divisors (25063195).

125315945 is an equidigital number, since it uses as much as digits as its factorization.

125315945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25063194.

The product of its digits is 27000, while the sum is 35.

The square root of 125315945 is about 11194.4604604242. The cubic root of 125315945 is about 500.4209055776.

The spelling of 125315945 in words is "one hundred twenty-five million, three hundred fifteen thousand, nine hundred forty-five".