1461122645 has 4 divisors (see below), whose sum is σ = 1753347180. Its totient is φ = 1168898112.

The previous prime is 1461122639. The next prime is 1461122693. The reversal of 1461122645 is 5462211641.

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 351300049 + 1109822596 = 18743^2 + 33314^2 .

It is a cyclic number.

It is not a de Polignac number, because 1461122645 - 2⁶ = 1461122581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146112260 + ... + 146112269.

It is an arithmetic number, because the mean of its divisors is an integer number (438336795).

Almost surely, 2^1461122645 is an apocalyptic number.

It is an amenable number.

1461122645 is a deficient number, since it is larger than the sum of its proper divisors (292224535).

1461122645 is an equidigital number, since it uses as much as digits as its factorization.

1461122645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292224534.

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

The square root of 1461122645 is about 38224.6340074042. The cubic root of 1461122645 is about 1134.7378915670.

The spelling of 1461122645 in words is "one billion, four hundred sixty-one million, one hundred twenty-two thousand, six hundred forty-five".