45451261 has 2 divisors, whose sum is σ = 45451262. Its totient is φ = 45451260.

The previous prime is 45451213. The next prime is 45451277. The reversal of 45451261 is 16215454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44488900 + 962361 = 6670^2 + 981^2 .

It is a cyclic number.

It is not a de Polignac number, because 45451261 - 2²¹ = 43354109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45451201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22725630 + 22725631.

It is an arithmetic number, because the mean of its divisors is an integer number (22725631).

Almost surely, 2^45451261 is an apocalyptic number.

It is an amenable number.

45451261 is a deficient number, since it is larger than the sum of its proper divisors (1).

45451261 is an equidigital number, since it uses as much as digits as its factorization.

45451261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 28.

The square root of 45451261 is about 6741.7550385638. The cubic root of 45451261 is about 356.8743316626.

It can be divided in two parts, 454 and 51261, that added together give a palindrome (51715).

The spelling of 45451261 in words is "forty-five million, four hundred fifty-one thousand, two hundred sixty-one".