45421155 has 40 divisors (see below), whose sum is σ = 87694992. Its totient is φ = 22358592.

The previous prime is 45421147. The next prime is 45421183. The reversal of 45421155 is 55112454.

45421155 is a `hidden beast` number, since 4 + 542 + 115 + 5 = 666.

It is not a de Polignac number, because 45421155 - 2³ = 45421147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 952 + ... + 9578.

Almost surely, 2^45421155 is an apocalyptic number.

45421155 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

45421155 is a deficient number, since it is larger than the sum of its proper divisors (42273837).

45421155 is a wasteful number, since it uses less digits than its factorization.

45421155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8657 (or 8648 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 45421155 is about 6739.5218673137. The cubic root of 45421155 is about 356.7955188018.

It can be divided in two parts, 454 and 21155, that added together give a square (21609 = 147²).

The spelling of 45421155 in words is "forty-five million, four hundred twenty-one thousand, one hundred fifty-five".