120105553 has 4 divisors (see below), whose sum is σ = 121168548. Its totient is φ = 119042560.

The previous prime is 120105547. The next prime is 120105611. The reversal of 120105553 is 355501021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355501021 = 73 ⋅4869877.

It can be written as a sum of positive squares in 2 ways, for example, as 47651409 + 72454144 = 6903^2 + 8512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120105553 is a prime.

It is a super-2 number, since 2×120105553² = 28850687722871618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120115553) 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, 531328 + ... + 531553.

It is an arithmetic number, because the mean of its divisors is an integer number (30292137).

Almost surely, 2^120105553 is an apocalyptic number.

It is an amenable number.

120105553 is a deficient number, since it is larger than the sum of its proper divisors (1062995).

120105553 is a wasteful number, since it uses less digits than its factorization.

120105553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062994.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 120105553 is about 10959.2679043812. The cubic root of 120105553 is about 493.3869925300.

Adding to 120105553 its reverse (355501021), we get a palindrome (475606574).

The spelling of 120105553 in words is "one hundred twenty million, one hundred five thousand, five hundred fifty-three".