125544405 has 64 divisors (see below), whose sum is σ = 247269888. Its totient is φ = 53084160.

The previous prime is 125544359. The next prime is 125544407. The reversal of 125544405 is 504445521.

It is not a de Polignac number, because 125544405 - 2⁸ = 125544149 is a prime.

It is a super-2 number, since 2×125544405² = 31522795253608050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125544407) 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 63 ways as a sum of consecutive naturals, for example, 108309 + ... + 109461.

It is an arithmetic number, because the mean of its divisors is an integer number (3863592).

Almost surely, 2^125544405 is an apocalyptic number.

125544405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125544405 is a deficient number, since it is larger than the sum of its proper divisors (121725483).

125544405 is a wasteful number, since it uses less digits than its factorization.

125544405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 125544405 is about 11204.6599680669. The cubic root of 125544405 is about 500.7248220915.

Adding to 125544405 its reverse (504445521), we get a palindrome (629989926).

The spelling of 125544405 in words is "one hundred twenty-five million, five hundred forty-four thousand, four hundred five".