120517531 has 4 divisors (see below), whose sum is σ = 120943672. Its totient is φ = 120091392.

The previous prime is 120517489. The next prime is 120517549. The reversal of 120517531 is 135715021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135715021 = 13 ⋅10439617.

It is a cyclic number.

It is not a de Polignac number, because 120517531 - 2¹⁹ = 119993243 is a prime.

It is a super-2 number, since 2×120517531² = 29048950556671922, 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 = 120517496 and 120517505.

It is not an unprimeable number, because it can be changed into a prime (120517571) 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, 212646 + ... + 213211.

It is an arithmetic number, because the mean of its divisors is an integer number (30235918).

Almost surely, 2^120517531 is an apocalyptic number.

120517531 is a deficient number, since it is larger than the sum of its proper divisors (426141).

120517531 is an equidigital number, since it uses as much as digits as its factorization.

120517531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426140.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 120517531 is about 10978.0476861781. The cubic root of 120517531 is about 493.9504763852.

The spelling of 120517531 in words is "one hundred twenty million, five hundred seventeen thousand, five hundred thirty-one".