125401551 has 16 divisors (see below), whose sum is σ = 185846400. Its totient is φ = 74565920.

The previous prime is 125401513. The next prime is 125401559. The reversal of 125401551 is 155104521.

It is not a de Polignac number, because 125401551 - 2⁶ = 125401487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125401559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34101 + ... + 37598.

It is an arithmetic number, because the mean of its divisors is an integer number (11615400).

Almost surely, 2^125401551 is an apocalyptic number.

125401551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125401551 is a deficient number, since it is larger than the sum of its proper divisors (60444849).

125401551 is a wasteful number, since it uses less digits than its factorization.

125401551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71766.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 125401551 is about 11198.2833952352. The cubic root of 125401551 is about 500.5348290451.

The spelling of 125401551 in words is "one hundred twenty-five million, four hundred one thousand, five hundred fifty-one".