125678145 has 16 divisors (see below), whose sum is σ = 201839040. Its totient is φ = 66777024.

The previous prime is 125678107. The next prime is 125678209. The reversal of 125678145 is 541876521.

It is not a de Polignac number, because 125678145 - 2⁶ = 125678081 is a prime.

It is a super-2 number, since 2×125678145² = 31589992261282050, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11539 + ... + 19608.

It is an arithmetic number, because the mean of its divisors is an integer number (12614940).

Almost surely, 2^125678145 is an apocalyptic number.

125678145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125678145 is a deficient number, since it is larger than the sum of its proper divisors (76160895).

125678145 is a wasteful number, since it uses less digits than its factorization.

125678145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31424.

The product of its digits is 67200, while the sum is 39.

The square root of 125678145 is about 11210.6264320956. The cubic root of 125678145 is about 500.9025631127.

It can be divided in two parts, 1256 and 78145, that added together give a triangular number (79401 = T₃₉₈).

The spelling of 125678145 in words is "one hundred twenty-five million, six hundred seventy-eight thousand, one hundred forty-five".