125111645 has 4 divisors (see below), whose sum is σ = 150133980. Its totient is φ = 100089312.

The previous prime is 125111633. The next prime is 125111717. The reversal of 125111645 is 546111521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546111521 = 199 ⋅2744279.

It can be written as a sum of positive squares in 2 ways, for example, as 88472836 + 36638809 = 9406^2 + 6053^2 .

It is a cyclic number.

It is not a de Polignac number, because 125111645 - 2¹⁶ = 125046109 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12511160 + ... + 12511169.

It is an arithmetic number, because the mean of its divisors is an integer number (37533495).

Almost surely, 2^125111645 is an apocalyptic number.

It is an amenable number.

125111645 is a deficient number, since it is larger than the sum of its proper divisors (25022335).

125111645 is an equidigital number, since it uses as much as digits as its factorization.

125111645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25022334.

The product of its digits is 1200, while the sum is 26.

The square root of 125111645 is about 11185.3316893153. The cubic root of 125111645 is about 500.1488157034.

The spelling of 125111645 in words is "one hundred twenty-five million, one hundred eleven thousand, six hundred forty-five".