120712521 has 4 divisors (see below), whose sum is σ = 160950032. Its totient is φ = 80475012.

The previous prime is 120712517. The next prime is 120712547. The reversal of 120712521 is 125217021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125217021 = 3 ⋅41739007.

It is not a de Polignac number, because 120712521 - 2² = 120712517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120712561) 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, 20118751 + ... + 20118756.

It is an arithmetic number, because the mean of its divisors is an integer number (40237508).

Almost surely, 2^120712521 is an apocalyptic number.

It is an amenable number.

120712521 is a deficient number, since it is larger than the sum of its proper divisors (40237511).

120712521 is an equidigital number, since it uses as much as digits as its factorization.

120712521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40237510.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 120712521 is about 10986.9250020194. The cubic root of 120712521 is about 494.2167267392.

Adding to 120712521 its reverse (125217021), we get a palindrome (245929542).

The spelling of 120712521 in words is "one hundred twenty million, seven hundred twelve thousand, five hundred twenty-one".