120615631 has 2 divisors, whose sum is σ = 120615632. Its totient is φ = 120615630.

The previous prime is 120615619. The next prime is 120615641. The reversal of 120615631 is 136516021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120615631 - 2¹³ = 120607439 is a prime.

It is a super-2 number, since 2×120615631² = 29096260883056322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120615596 and 120615605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120615641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60307815 + 60307816.

It is an arithmetic number, because the mean of its divisors is an integer number (60307816).

Almost surely, 2^120615631 is an apocalyptic number.

120615631 is a deficient number, since it is larger than the sum of its proper divisors (1).

120615631 is an equidigital number, since it uses as much as digits as its factorization.

120615631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 120615631 is about 10982.5147848751. The cubic root of 120615631 is about 494.0844635309.

The spelling of 120615631 in words is "one hundred twenty million, six hundred fifteen thousand, six hundred thirty-one".