125645854 has 4 divisors (see below), whose sum is σ = 188468784. Its totient is φ = 62822926.

The previous prime is 125645813. The next prime is 125645857. The reversal of 125645854 is 458546521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 458546521 = 29 ⋅15811949.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125645857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31411462 + ... + 31411465.

It is an arithmetic number, because the mean of its divisors is an integer number (47117196).

Almost surely, 2^125645854 is an apocalyptic number.

125645854 is a deficient number, since it is larger than the sum of its proper divisors (62822930).

125645854 is an equidigital number, since it uses as much as digits as its factorization.

125645854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62822929.

The product of its digits is 192000, while the sum is 40.

The square root of 125645854 is about 11209.1861435164. The cubic root of 125645854 is about 500.8596597897.

The spelling of 125645854 in words is "one hundred twenty-five million, six hundred forty-five thousand, eight hundred fifty-four".