120007731 has 4 divisors (see below), whose sum is σ = 160010312. Its totient is φ = 80005152.

The previous prime is 120007663. The next prime is 120007733. The reversal of 120007731 is 137700021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137700021 = 3 ⋅45900007.

It is not a de Polignac number, because 120007731 - 2⁹ = 120007219 is a prime.

It is a super-2 number, since 2×120007731² = 28803710999536722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120007698 and 120007707.

It is not an unprimeable number, because it can be changed into a prime (120007733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20001286 + ... + 20001291.

It is an arithmetic number, because the mean of its divisors is an integer number (40002578).

Almost surely, 2^120007731 is an apocalyptic number.

120007731 is a deficient number, since it is larger than the sum of its proper divisors (40002581).

120007731 is an equidigital number, since it uses as much as digits as its factorization.

120007731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40002580.

The product of its (nonzero) digits is 294, while the sum is 21.

The square root of 120007731 is about 10954.8040146778. The cubic root of 120007731 is about 493.2530070195.

Adding to 120007731 its reverse (137700021), we get a palindrome (257707752).

The spelling of 120007731 in words is "one hundred twenty million, seven thousand, seven hundred thirty-one".