45138461 has 2 divisors, whose sum is σ = 45138462. Its totient is φ = 45138460.

The previous prime is 45138439. The next prime is 45138493. The reversal of 45138461 is 16483154.

It is an a-pointer prime, because the next prime (45138493) can be obtained adding 45138461 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22992025 + 22146436 = 4795^2 + 4706^2 .

It is a cyclic number.

It is not a de Polignac number, because 45138461 - 2¹⁸ = 44876317 is a prime.

It is a super-2 number, since 2×45138461² = 4074961322897042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45138421) 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 as a sum of consecutive naturals, namely, 22569230 + 22569231.

It is an arithmetic number, because the mean of its divisors is an integer number (22569231).

Almost surely, 2^45138461 is an apocalyptic number.

It is an amenable number.

45138461 is a deficient number, since it is larger than the sum of its proper divisors (1).

45138461 is an equidigital number, since it uses as much as digits as its factorization.

45138461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 45138461 is about 6718.5162796558. The cubic root of 45138461 is about 356.0537650775.

The spelling of 45138461 in words is "forty-five million, one hundred thirty-eight thousand, four hundred sixty-one".