120731523 has 24 divisors (see below), whose sum is σ = 178806336. Its totient is φ = 71862000.

The previous prime is 120731519. The next prime is 120731537. The reversal of 120731523 is 325137021.

It is not a de Polignac number, because 120731523 - 2² = 120731519 is a prime.

It is a super-2 number, since 2×120731523² = 29152201291799058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120731493 and 120731502.

It is not an unprimeable number, because it can be changed into a prime (120731543) 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, 114348 + ... + 115398.

It is an arithmetic number, because the mean of its divisors is an integer number (7450264).

Almost surely, 2^120731523 is an apocalyptic number.

120731523 is a deficient number, since it is larger than the sum of its proper divisors (58074813).

120731523 is a wasteful number, since it uses less digits than its factorization.

120731523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 120731523 is about 10987.7897231427. The cubic root of 120731523 is about 494.2426578065.

Adding to 120731523 its reverse (325137021), we get a palindrome (445868544).

The spelling of 120731523 in words is "one hundred twenty million, seven hundred thirty-one thousand, five hundred twenty-three".