45412561 has 4 divisors (see below), whose sum is σ = 45829300. Its totient is φ = 44995824.

The previous prime is 45412519. The next prime is 45412567. The reversal of 45412561 is 16521454.

45412561 = T₃₅₅ + T₃₅₆ + ... + T₆₈₁.

45412561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14776336 + 30636225 = 3844^2 + 5535^2 .

It is a cyclic number.

It is not a de Polignac number, because 45412561 - 2¹⁹ = 44888273 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45412567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208206 + ... + 208423.

It is an arithmetic number, because the mean of its divisors is an integer number (11457325).

Almost surely, 2^45412561 is an apocalyptic number.

It is an amenable number.

45412561 is a deficient number, since it is larger than the sum of its proper divisors (416739).

45412561 is a wasteful number, since it uses less digits than its factorization.

45412561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416738.

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

The square root of 45412561 is about 6738.8842548303. The cubic root of 45412561 is about 356.7730146471.

The spelling of 45412561 in words is "forty-five million, four hundred twelve thousand, five hundred sixty-one".