1249964563 has 4 divisors (see below), whose sum is σ = 1250095248. Its totient is φ = 1249833880.

The previous prime is 1249964531. The next prime is 1249964567. The reversal of 1249964563 is 3654699421.

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

It is a cyclic number.

It is not a de Polignac number, because 1249964563 - 2⁵ = 1249964531 is a prime.

It is a super-2 number, since 2×1249964563² = 3124822817511561938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249964567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49756 + ... + 70537.

It is an arithmetic number, because the mean of its divisors is an integer number (312523812).

Almost surely, 2^1249964563 is an apocalyptic number.

1249964563 is a deficient number, since it is larger than the sum of its proper divisors (130685).

1249964563 is a wasteful number, since it uses less digits than its factorization.

1249964563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130684.

The product of its digits is 1399680, while the sum is 49.

The square root of 1249964563 is about 35354.8379009153. The cubic root of 1249964563 is about 1077.2071653595.

The spelling of 1249964563 in words is "one billion, two hundred forty-nine million, nine hundred sixty-four thousand, five hundred sixty-three".