45646021 has 2 divisors, whose sum is σ = 45646022. Its totient is φ = 45646020.

The previous prime is 45646009. The next prime is 45646057. The reversal of 45646021 is 12064654.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45562500 + 83521 = 6750^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 45646021 - 2⁵ = 45645989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45646061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22823010 + 22823011.

It is an arithmetic number, because the mean of its divisors is an integer number (22823011).

Almost surely, 2^45646021 is an apocalyptic number.

It is an amenable number.

45646021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45646021 is an equidigital number, since it uses as much as digits as its factorization.

45646021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 45646021 is about 6756.1839080949. The cubic root of 45646021 is about 357.3833443368.

It can be divided in two parts, 4564 and 6021, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 45646021 in words is "forty-five million, six hundred forty-six thousand, twenty-one".