128274553 has 4 divisors (see below), whose sum is σ = 139935888. Its totient is φ = 116613220.

The previous prime is 128274539. The next prime is 128274563. The reversal of 128274553 is 355472821.

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 128274553 - 2¹³ = 128266361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128274563) 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, 5830651 + ... + 5830672.

It is an arithmetic number, because the mean of its divisors is an integer number (34983972).

Almost surely, 2^128274553 is an apocalyptic number.

It is an amenable number.

128274553 is a deficient number, since it is larger than the sum of its proper divisors (11661335).

128274553 is a wasteful number, since it uses less digits than its factorization.

128274553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11661334.

The product of its digits is 67200, while the sum is 37.

The square root of 128274553 is about 11325.8356424592. The cubic root of 128274553 is about 504.3284908697.

The spelling of 128274553 in words is "one hundred twenty-eight million, two hundred seventy-four thousand, five hundred fifty-three".