1246544645 has 4 divisors (see below), whose sum is σ = 1495853580. Its totient is φ = 997235712.

The previous prime is 1246544603. The next prime is 1246544653. The reversal of 1246544645 is 5464456421.

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 667757281 + 578787364 = 25841^2 + 24058^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246544645 - 2¹⁶ = 1246479109 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, 124654460 + ... + 124654469.

It is an arithmetic number, because the mean of its divisors is an integer number (373963395).

Almost surely, 2^1246544645 is an apocalyptic number.

It is an amenable number.

1246544645 is a deficient number, since it is larger than the sum of its proper divisors (249308935).

1246544645 is an equidigital number, since it uses as much as digits as its factorization.

1246544645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249308934.

The product of its digits is 460800, while the sum is 41.

The square root of 1246544645 is about 35306.4391435897. The cubic root of 1246544645 is about 1076.2238507957.

The spelling of 1246544645 in words is "one billion, two hundred forty-six million, five hundred forty-four thousand, six hundred forty-five".