125554520 has 128 divisors (see below), whose sum is σ = 368323200. Its totient is φ = 37380096.

The previous prime is 125554511. The next prime is 125554529. The reversal of 125554520 is 25455521.

It is an interprime number because it is at equal distance from previous prime (125554511) and next prime (125554529).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125554529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60866 + ... + 62894.

It is an arithmetic number, because the mean of its divisors is an integer number (2877525).

Almost surely, 2^125554520 is an apocalyptic number.

125554520 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 125554520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184161600).

125554520 is an abundant number, since it is smaller than the sum of its proper divisors (242768680).

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

125554520 is a wasteful number, since it uses less digits than its factorization.

125554520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077 (or 2073 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 125554520 is about 11205.1113336727. Note that the first 3 decimals coincide. The cubic root of 125554520 is about 500.7382693801.

The spelling of 125554520 in words is "one hundred twenty-five million, five hundred fifty-four thousand, five hundred twenty".