125666153 has 4 divisors (see below), whose sum is σ = 126509700. Its totient is φ = 124822608.

The previous prime is 125666143. The next prime is 125666173. The reversal of 125666153 is 351666521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 351666521 = 107 ⋅3286603.

It can be written as a sum of positive squares in 2 ways, for example, as 47997184 + 77668969 = 6928^2 + 8813^2 .

It is a cyclic number.

It is not a de Polignac number, because 125666153 - 2¹⁶ = 125600617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125666113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421550 + ... + 421847.

It is an arithmetic number, because the mean of its divisors is an integer number (31627425).

Almost surely, 2^125666153 is an apocalyptic number.

It is an amenable number.

125666153 is a deficient number, since it is larger than the sum of its proper divisors (843547).

125666153 is an equidigital number, since it uses as much as digits as its factorization.

125666153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843546.

The product of its digits is 32400, while the sum is 35.

The square root of 125666153 is about 11210.0915696528. The cubic root of 125666153 is about 500.8866308422.

The spelling of 125666153 in words is "one hundred twenty-five million, six hundred sixty-six thousand, one hundred fifty-three".