125544012405 has 32 divisors (see below), whose sum is σ = 230111563008. Its totient is φ = 57255206400.

The previous prime is 125544012379. The next prime is 125544012413. The reversal of 125544012405 is 504210445521.

It is a happy number.

It is not a de Polignac number, because 125544012405 - 2¹³ = 125544004213 is a prime.

It is a super-2 number, since 2×125544012405² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1375816 + ... + 1464225.

It is an arithmetic number, because the mean of its divisors is an integer number (7190986344).

Almost surely, 2^125544012405 is an apocalyptic number.

125544012405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125544012405 is a deficient number, since it is larger than the sum of its proper divisors (104567550603).

125544012405 is a wasteful number, since it uses less digits than its factorization.

125544012405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840477.

The product of its (nonzero) digits is 32000, while the sum is 33.

Adding to 125544012405 its reverse (504210445521), we get a palindrome (629754457926).

The spelling of 125544012405 in words is "one hundred twenty-five billion, five hundred forty-four million, twelve thousand, four hundred five".