45455421 has 16 divisors (see below), whose sum is σ = 67026240. Its totient is φ = 27169920.

The previous prime is 45455401. The next prime is 45455437. The reversal of 45455421 is 12455454.

45455421 = 628² + 629² + ... + 726².

It is not a de Polignac number, because 45455421 - 2¹⁵ = 45422653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45455401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7026 + ... + 11843.

It is an arithmetic number, because the mean of its divisors is an integer number (4189140).

Almost surely, 2^45455421 is an apocalyptic number.

It is an amenable number.

45455421 is a deficient number, since it is larger than the sum of its proper divisors (21570819).

45455421 is a wasteful number, since it uses less digits than its factorization.

45455421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18956.

The product of its digits is 16000, while the sum is 30.

The square root of 45455421 is about 6742.0635565085. The cubic root of 45455421 is about 356.8852191634.

The spelling of 45455421 in words is "forty-five million, four hundred fifty-five thousand, four hundred twenty-one".