45999021 has 4 divisors (see below), whose sum is σ = 61332032. Its totient is φ = 30666012.

The previous prime is 45998999. The next prime is 45999043. The reversal of 45999021 is 12099954.

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 (45998999) and next prime (45999043).

It is not a de Polignac number, because 45999021 - 2⁷ = 45998893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45999061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7666501 + ... + 7666506.

It is an arithmetic number, because the mean of its divisors is an integer number (15333008).

Almost surely, 2^45999021 is an apocalyptic number.

It is an amenable number.

45999021 is a deficient number, since it is larger than the sum of its proper divisors (15333011).

45999021 is a wasteful number, since it uses less digits than its factorization.

45999021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15333010.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 45999021 is about 6782.2578099037. The cubic root of 45999021 is about 358.3022451967.

The spelling of 45999021 in words is "forty-five million, nine hundred ninety-nine thousand, twenty-one".