125649155 has 8 divisors (see below), whose sum is σ = 151262592. Its totient is φ = 100196928.

The previous prime is 125649149. The next prime is 125649179. The reversal of 125649155 is 551946521.

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 125649155 - 2⁸ = 125648899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38579 + ... + 41708.

It is an arithmetic number, because the mean of its divisors is an integer number (18907824).

Almost surely, 2^125649155 is an apocalyptic number.

125649155 is a deficient number, since it is larger than the sum of its proper divisors (25613437).

125649155 is an equidigital number, since it uses as much as digits as its factorization.

125649155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80605.

The product of its digits is 54000, while the sum is 38.

The square root of 125649155 is about 11209.3333878514. Note that the first 4 decimals coincide. The cubic root of 125649155 is about 500.8640459890.

The spelling of 125649155 in words is "one hundred twenty-five million, six hundred forty-nine thousand, one hundred fifty-five".