45135921 has 4 divisors (see below), whose sum is σ = 60181232. Its totient is φ = 30090612.

The previous prime is 45135911. The next prime is 45135931. The reversal of 45135921 is 12953154.

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 an interprime number because it is at equal distance from previous prime (45135911) and next prime (45135931).

It is not a de Polignac number, because 45135921 - 2¹⁰ = 45134897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45135911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7522651 + ... + 7522656.

It is an arithmetic number, because the mean of its divisors is an integer number (15045308).

Almost surely, 2^45135921 is an apocalyptic number.

It is an amenable number.

45135921 is a deficient number, since it is larger than the sum of its proper divisors (15045311).

45135921 is a wasteful number, since it uses less digits than its factorization.

45135921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15045310.

The product of its digits is 5400, while the sum is 30.

The square root of 45135921 is about 6718.3272471650. The cubic root of 45135921 is about 356.0470864159.

It can be divided in two parts, 45135 and 921, that added together give a triangular number (46056 = T₃₀₃).

The spelling of 45135921 in words is "forty-five million, one hundred thirty-five thousand, nine hundred twenty-one".