121472553 has 4 divisors (see below), whose sum is σ = 161963408. Its totient is φ = 80981700.

The previous prime is 121472509. The next prime is 121472569. The reversal of 121472553 is 355274121.

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: 355274121 = 3 ⋅118424707.

It is not a de Polignac number, because 121472553 - 2⁸ = 121472297 is a prime.

It is a super-3 number, since 3×121472553³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121472553.

It is not an unprimeable number, because it can be changed into a prime (121472573) 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, 20245423 + ... + 20245428.

It is an arithmetic number, because the mean of its divisors is an integer number (40490852).

Almost surely, 2^121472553 is an apocalyptic number.

It is an amenable number.

121472553 is a deficient number, since it is larger than the sum of its proper divisors (40490855).

121472553 is an equidigital number, since it uses as much as digits as its factorization.

121472553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40490854.

The product of its digits is 8400, while the sum is 30.

The square root of 121472553 is about 11021.4587510003. The cubic root of 121472553 is about 495.2517890534.

The spelling of 121472553 in words is "one hundred twenty-one million, four hundred seventy-two thousand, five hundred fifty-three".