125161643 has 8 divisors (see below), whose sum is σ = 128365776. Its totient is φ = 121964800.

The previous prime is 125161637. The next prime is 125161697. The reversal of 125161643 is 346161521.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 125161643 - 2²⁴ = 108384427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125161843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54680 + ... + 56922.

It is an arithmetic number, because the mean of its divisors is an integer number (16045722).

Almost surely, 2^125161643 is an apocalyptic number.

125161643 is a deficient number, since it is larger than the sum of its proper divisors (3204133).

125161643 is a wasteful number, since it uses less digits than its factorization.

125161643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3645.

The product of its digits is 4320, while the sum is 29.

The square root of 125161643 is about 11187.5664467300. The cubic root of 125161643 is about 500.2154311655.

The spelling of 125161643 in words is "one hundred twenty-five million, one hundred sixty-one thousand, six hundred forty-three".