45061021 has 2 divisors, whose sum is σ = 45061022. Its totient is φ = 45061020.

The previous prime is 45061019. The next prime is 45061039. The reversal of 45061021 is 12016054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41100921 + 3960100 = 6411^2 + 1990^2 .

It is a cyclic number.

It is not a de Polignac number, because 45061021 - 2¹ = 45061019 is a prime.

It is a super-2 number, since 2×45061021² = 4060991227124882, which contains 22 as substring.

Together with 45061019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 45061021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45061421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22530510 + 22530511.

It is an arithmetic number, because the mean of its divisors is an integer number (22530511).

Almost surely, 2^45061021 is an apocalyptic number.

It is an amenable number.

45061021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45061021 is an equidigital number, since it uses as much as digits as its factorization.

45061021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 45061021 is about 6712.7506284682. The cubic root of 45061021 is about 355.8500320447.

Adding to 45061021 its reverse (12016054), we get a palindrome (57077075).

The spelling of 45061021 in words is "forty-five million, sixty-one thousand, twenty-one".