45438521 has 2 divisors, whose sum is σ = 45438522. Its totient is φ = 45438520.

The previous prime is 45438517. The next prime is 45438527. The reversal of 45438521 is 12583454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32035600 + 13402921 = 5660^2 + 3661^2 .

It is a cyclic number.

It is not a de Polignac number, because 45438521 - 2² = 45438517 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (45438527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22719260 + 22719261.

It is an arithmetic number, because the mean of its divisors is an integer number (22719261).

Almost surely, 2^45438521 is an apocalyptic number.

It is an amenable number.

45438521 is a deficient number, since it is larger than the sum of its proper divisors (1).

45438521 is an equidigital number, since it uses as much as digits as its factorization.

45438521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 32.

The square root of 45438521 is about 6740.8101145189. The cubic root of 45438521 is about 356.8409845580.

The spelling of 45438521 in words is "forty-five million, four hundred thirty-eight thousand, five hundred twenty-one".