125431245 has 12 divisors (see below), whose sum is σ = 217414236. Its totient is φ = 66896640.

The previous prime is 125431211. The next prime is 125431277. The reversal of 125431245 is 542134521.

It can be written as a sum of positive squares in 2 ways, for example, as 36072036 + 89359209 = 6006^2 + 9453^2 .

It is not a de Polignac number, because 125431245 - 2⁶ = 125431181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1393636 + ... + 1393725.

It is an arithmetic number, because the mean of its divisors is an integer number (18117853).

Almost surely, 2^125431245 is an apocalyptic number.

125431245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125431245 is a deficient number, since it is larger than the sum of its proper divisors (91982991).

125431245 is a wasteful number, since it uses less digits than its factorization.

125431245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787372 (or 2787369 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 125431245 is about 11199.6091449657. The cubic root of 125431245 is about 500.5743333631.

Adding to 125431245 its reverse (542134521), we get a palindrome (667565766).

The spelling of 125431245 in words is "one hundred twenty-five million, four hundred thirty-one thousand, two hundred forty-five".