45252421 has 4 divisors (see below), whose sum is σ = 45276192. Its totient is φ = 45228652.

The previous prime is 45252413. The next prime is 45252439. The reversal of 45252421 is 12425254.

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 45252421 - 2³ = 45252413 is a prime.

It is a super-2 number, since 2×45252421² = 4095563212722482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45252451) 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, 8755 + ... + 12928.

It is an arithmetic number, because the mean of its divisors is an integer number (11319048).

Almost surely, 2^45252421 is an apocalyptic number.

It is an amenable number.

45252421 is a deficient number, since it is larger than the sum of its proper divisors (23771).

45252421 is a wasteful number, since it uses less digits than its factorization.

45252421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23770.

The product of its digits is 3200, while the sum is 25.

The square root of 45252421 is about 6726.9919726428. The cubic root of 45252421 is about 356.3531534261.

Adding to 45252421 its reverse (12425254), we get a palindrome (57677675).

The spelling of 45252421 in words is "forty-five million, two hundred fifty-two thousand, four hundred twenty-one".