1251152563 has 4 divisors (see below), whose sum is σ = 1257082408. Its totient is φ = 1245222720.

The previous prime is 1251152561. The next prime is 1251152593. The reversal of 1251152563 is 3652511521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3652511521 = 443 ⋅8244947.

It is a cyclic number.

It is not a de Polignac number, because 1251152563 - 2¹ = 1251152561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251152561) 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, 2964606 + ... + 2965027.

It is an arithmetic number, because the mean of its divisors is an integer number (314270602).

Almost surely, 2^1251152563 is an apocalyptic number.

1251152563 is a deficient number, since it is larger than the sum of its proper divisors (5929845).

1251152563 is an equidigital number, since it uses as much as digits as its factorization.

1251152563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5929844.

The product of its digits is 9000, while the sum is 31.

The square root of 1251152563 is about 35371.6350060327. The cubic root of 1251152563 is about 1077.5483262043.

The spelling of 1251152563 in words is "one billion, two hundred fifty-one million, one hundred fifty-two thousand, five hundred sixty-three".