45321491 has 4 divisors (see below), whose sum is σ = 45354552. Its totient is φ = 45288432.

The previous prime is 45321481. The next prime is 45321509. The reversal of 45321491 is 19412354.

45321491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45321491 - 2¹⁰ = 45320467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45321401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14381 + ... + 17246.

It is an arithmetic number, because the mean of its divisors is an integer number (11338638).

Almost surely, 2^45321491 is an apocalyptic number.

45321491 is a deficient number, since it is larger than the sum of its proper divisors (33061).

45321491 is a wasteful number, since it uses less digits than its factorization.

45321491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33060.

The product of its digits is 4320, while the sum is 29.

The square root of 45321491 is about 6732.1238105073. The cubic root of 45321491 is about 356.5343650955.

The spelling of 45321491 in words is "forty-five million, three hundred twenty-one thousand, four hundred ninety-one".