45148561 has 2 divisors, whose sum is σ = 45148562. Its totient is φ = 45148560.

The previous prime is 45148559. The next prime is 45148573. The reversal of 45148561 is 16584154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45144961 + 3600 = 6719^2 + 60^2 .

It is a cyclic number.

It is not a de Polignac number, because 45148561 - 2¹ = 45148559 is a prime.

Together with 45148559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (45148501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22574280 + 22574281.

It is an arithmetic number, because the mean of its divisors is an integer number (22574281).

Almost surely, 2^45148561 is an apocalyptic number.

It is an amenable number.

45148561 is a deficient number, since it is larger than the sum of its proper divisors (1).

45148561 is an equidigital number, since it uses as much as digits as its factorization.

45148561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 34.

The square root of 45148561 is about 6719.2678916680. The cubic root of 45148561 is about 356.0803194819.

The spelling of 45148561 in words is "forty-five million, one hundred forty-eight thousand, five hundred sixty-one".