120561820 has 24 divisors (see below), whose sum is σ = 253461600. Its totient is φ = 48171072.

The previous prime is 120561817. The next prime is 120561823. The reversal of 120561820 is 28165021.

It is an interprime number because it is at equal distance from previous prime (120561817) and next prime (120561823).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120561823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18561 + ... + 24199.

It is an arithmetic number, because the mean of its divisors is an integer number (10560900).

Almost surely, 2^120561820 is an apocalyptic number.

120561820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120561820 is an abundant number, since it is smaller than the sum of its proper divisors (132899780).

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

120561820 is a wasteful number, since it uses less digits than its factorization.

120561820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6717 (or 6715 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 120561820 is about 10980.0646628333. The cubic root of 120561820 is about 494.0109762787.

The spelling of 120561820 in words is "one hundred twenty million, five hundred sixty-one thousand, eight hundred twenty".