120415553 has 4 divisors (see below), whose sum is σ = 121541040. Its totient is φ = 119290068.

The previous prime is 120415543. The next prime is 120415567. The reversal of 120415553 is 355514021.

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.

It is a cyclic number.

It is not a de Polignac number, because 120415553 - 2¹⁰ = 120414529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120415543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562583 + ... + 562796.

It is an arithmetic number, because the mean of its divisors is an integer number (30385260).

Almost surely, 2^120415553 is an apocalyptic number.

It is an amenable number.

120415553 is a deficient number, since it is larger than the sum of its proper divisors (1125487).

120415553 is a wasteful number, since it uses less digits than its factorization.

120415553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125486.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 120415553 is about 10973.4020704611. The cubic root of 120415553 is about 493.8111154814.

Adding to 120415553 its reverse (355514021), we get a palindrome (475929574).

The spelling of 120415553 in words is "one hundred twenty million, four hundred fifteen thousand, five hundred fifty-three".