45986921 has 4 divisors (see below), whose sum is σ = 48692052. Its totient is φ = 43281792.

The previous prime is 45986917. The next prime is 45986929. The reversal of 45986921 is 12968954.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12968954 = 2 ⋅6484477.

It can be written as a sum of positive squares in 2 ways, for example, as 32947600 + 13039321 = 5740^2 + 3611^2 .

It is a cyclic number.

It is not a de Polignac number, because 45986921 - 2² = 45986917 is a prime.

It is a super-2 number, since 2×45986921² = 4229593806120482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45986929) 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, 1352540 + ... + 1352573.

It is an arithmetic number, because the mean of its divisors is an integer number (12173013).

Almost surely, 2^45986921 is an apocalyptic number.

It is an amenable number.

45986921 is a deficient number, since it is larger than the sum of its proper divisors (2705131).

45986921 is a wasteful number, since it uses less digits than its factorization.

45986921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705130.

The product of its digits is 155520, while the sum is 44.

The square root of 45986921 is about 6781.3657179067. The cubic root of 45986921 is about 358.2708254166.

The spelling of 45986921 in words is "forty-five million, nine hundred eighty-six thousand, nine hundred twenty-one".