45112421 has 4 divisors (see below), whose sum is σ = 45230592. Its totient is φ = 44994252.

The previous prime is 45112393. The next prime is 45112427. The reversal of 45112421 is 12421154.

It is a happy number.

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: 12421154 = 2 ⋅6210577.

It is a cyclic number.

It is not a de Polignac number, because 45112421 - 2¹⁸ = 44850277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45112393 and 45112402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45112427) 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, 58511 + ... + 59276.

It is an arithmetic number, because the mean of its divisors is an integer number (11307648).

Almost surely, 2^45112421 is an apocalyptic number.

It is an amenable number.

45112421 is a deficient number, since it is larger than the sum of its proper divisors (118171).

45112421 is a wasteful number, since it uses less digits than its factorization.

45112421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118170.

The product of its digits is 320, while the sum is 20.

The square root of 45112421 is about 6716.5780722031. The cubic root of 45112421 is about 355.9852837623.

Adding to 45112421 its reverse (12421154), we get a palindrome (57533575).

The spelling of 45112421 in words is "forty-five million, one hundred twelve thousand, four hundred twenty-one".