45942921 has 6 divisors (see below), whose sum is σ = 66362010. Its totient is φ = 30628608.

The previous prime is 45942917. The next prime is 45942973. The reversal of 45942921 is 12924954.

It can be written as a sum of positive squares in only one way, i.e., 40182921 + 5760000 = 6339^2 + 2400^2 .

It is not a de Polignac number, because 45942921 - 2² = 45942917 is a prime.

It is a super-2 number, since 2×45942921² = 4221503980024482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45942991) 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 5 ways as a sum of consecutive naturals, for example, 2552376 + ... + 2552393.

It is an arithmetic number, because the mean of its divisors is an integer number (11060335).

Almost surely, 2^45942921 is an apocalyptic number.

It is an amenable number.

45942921 is a deficient number, since it is larger than the sum of its proper divisors (20419089).

45942921 is a wasteful number, since it uses less digits than its factorization.

45942921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104775 (or 5104772 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 45942921 is about 6778.1207572601. The cubic root of 45942921 is about 358.1565251891.

The spelling of 45942921 in words is "forty-five million, nine hundred forty-two thousand, nine hundred twenty-one".