125661723 has 8 divisors (see below), whose sum is σ = 182780736. Its totient is φ = 76158600.

The previous prime is 125661709. The next prime is 125661737. The reversal of 125661723 is 327166521.

It is an interprime number because it is at equal distance from previous prime (125661709) and next prime (125661737).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125661723 - 2¹⁷ = 125530651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 3807931 = 125661723 / (1 + 2 + 5 + 6 + 6 + 1 + 7 + 2 + 3).

It is not an unprimeable number, because it can be changed into a prime (125661703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1903933 + ... + 1903998.

It is an arithmetic number, because the mean of its divisors is an integer number (22847592).

Almost surely, 2^125661723 is an apocalyptic number.

125661723 is a deficient number, since it is larger than the sum of its proper divisors (57119013).

125661723 is a wasteful number, since it uses less digits than its factorization.

125661723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807945.

The product of its digits is 15120, while the sum is 33.

The square root of 125661723 is about 11209.8939780892. The cubic root of 125661723 is about 500.8807449989.

The spelling of 125661723 in words is "one hundred twenty-five million, six hundred sixty-one thousand, seven hundred twenty-three".