125544021435 has 24 divisors (see below), whose sum is σ = 248696728800. Its totient is φ = 57391552512.

The previous prime is 125544021431. The next prime is 125544021451. The reversal of 125544021435 is 534120445521.

125544021435 is a `hidden beast` number, since 1 + 2 + 554 + 40 + 21 + 43 + 5 = 666.

It is not a de Polignac number, because 125544021435 - 2² = 125544021431 is a prime.

It is a super-2 number, since 2×125544021435² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125544021435.

It is not an unprimeable number, because it can be changed into a prime (125544021431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199275910 + ... + 199276539.

It is an arithmetic number, because the mean of its divisors is an integer number (10362363700).

Almost surely, 2^125544021435 is an apocalyptic number.

125544021435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125544021435 is a deficient number, since it is larger than the sum of its proper divisors (123152707365).

125544021435 is a wasteful number, since it uses less digits than its factorization.

125544021435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398552467 (or 398552464 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 125544021435 its reverse (534120445521), we get a palindrome (659664466956).

The spelling of 125544021435 in words is "one hundred twenty-five billion, five hundred forty-four million, twenty-one thousand, four hundred thirty-five".