125651745 has 12 divisors (see below), whose sum is σ = 217796436. Its totient is φ = 67014240.

The previous prime is 125651707. The next prime is 125651749. The reversal of 125651745 is 547156521.

It can be written as a sum of positive squares in 2 ways, for example, as 15968016 + 109683729 = 3996^2 + 10473^2 .

It is not a de Polignac number, because 125651745 - 2⁶ = 125651681 is a prime.

It is a super-2 number, since 2×125651745² = 31576722043090050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125651749) 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, 1396086 + ... + 1396175.

It is an arithmetic number, because the mean of its divisors is an integer number (18149703).

Almost surely, 2^125651745 is an apocalyptic number.

125651745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125651745 is a deficient number, since it is larger than the sum of its proper divisors (92144691).

125651745 is a wasteful number, since it uses less digits than its factorization.

125651745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792272 (or 2792269 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 125651745 is about 11209.4489159816. The cubic root of 125651745 is about 500.8674873942.

The spelling of 125651745 in words is "one hundred twenty-five million, six hundred fifty-one thousand, seven hundred forty-five".