125005643420 has 96 divisors (see below), whose sum is σ = 306279792000. Its totient is φ = 42838989312.

The previous prime is 125005643419. The next prime is 125005643449. The reversal of 125005643420 is 24346500521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28350176 + ... + 28354584.

It is an arithmetic number, because the mean of its divisors is an integer number (3190414500).

Almost surely, 2^125005643420 is an apocalyptic number.

125005643420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125005643420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153139896000).

125005643420 is an abundant number, since it is smaller than the sum of its proper divisors (181274148580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125005643420 is a wasteful number, since it uses less digits than its factorization.

125005643420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8572 (or 8556 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 125005643420 in words is "one hundred twenty-five billion, five million, six hundred forty-three thousand, four hundred twenty".