125521030 has 32 divisors (see below), whose sum is σ = 251825760. Its totient is φ = 44766720.

The previous prime is 125521003. The next prime is 125521037. The reversal of 125521030 is 30125521.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 125520989 and 125521007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125521037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16201 + ... + 22660.

It is an arithmetic number, because the mean of its divisors is an integer number (7869555).

Almost surely, 2^125521030 is an apocalyptic number.

125521030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125521030 is an abundant number, since it is smaller than the sum of its proper divisors (126304730).

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

125521030 is a wasteful number, since it uses less digits than its factorization.

125521030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38904.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 125521030 is about 11203.6168267216. The cubic root of 125521030 is about 500.6937436610.

Adding to 125521030 its reverse (30125521), we get a palindrome (155646551).

The spelling of 125521030 in words is "one hundred twenty-five million, five hundred twenty-one thousand, thirty".