120145523 has 4 divisors (see below), whose sum is σ = 120263088. Its totient is φ = 120027960.

The previous prime is 120145513. The next prime is 120145547. The reversal of 120145523 is 325541021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120145523 - 2²² = 115951219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120145513) 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, 57236 + ... + 59297.

It is an arithmetic number, because the mean of its divisors is an integer number (30065772).

Almost surely, 2^120145523 is an apocalyptic number.

120145523 is a deficient number, since it is larger than the sum of its proper divisors (117565).

120145523 is a wasteful number, since it uses less digits than its factorization.

120145523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117564.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 120145523 is about 10961.0913234039. The cubic root of 120145523 is about 493.4417179788.

Adding to 120145523 its reverse (325541021), we get a palindrome (445686544).

The spelling of 120145523 in words is "one hundred twenty million, one hundred forty-five thousand, five hundred twenty-three".