120401631 has 24 divisors (see below), whose sum is σ = 199165824. Its totient is φ = 68659920.

The previous prime is 120401629. The next prime is 120401647. The reversal of 120401631 is 136104021.

It is a happy number.

It is not a de Polignac number, because 120401631 - 2¹ = 120401629 is a prime.

It is a super-2 number, since 2×120401631² = 28993105494920322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120401621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34300 + ... + 37646.

It is an arithmetic number, because the mean of its divisors is an integer number (8298576).

Almost surely, 2^120401631 is an apocalyptic number.

120401631 is a deficient number, since it is larger than the sum of its proper divisors (78764193).

120401631 is a wasteful number, since it uses less digits than its factorization.

120401631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931 (or 3928 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 120401631 is about 10972.7677000837. The cubic root of 120401631 is about 493.7920838776.

Adding to 120401631 its reverse (136104021), we get a palindrome (256505652).

The spelling of 120401631 in words is "one hundred twenty million, four hundred one thousand, six hundred thirty-one".