1252611863 has 4 divisors (see below), whose sum is σ = 1259852568. Its totient is φ = 1245371160.

The previous prime is 1252611853. The next prime is 1252611889. The reversal of 1252611863 is 3681162521.

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 1252611863 - 2¹⁶ = 1252546327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252611853) 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, 3620093 + ... + 3620438.

It is an arithmetic number, because the mean of its divisors is an integer number (314963142).

Almost surely, 2^1252611863 is an apocalyptic number.

1252611863 is a deficient number, since it is larger than the sum of its proper divisors (7240705).

1252611863 is an equidigital number, since it uses as much as digits as its factorization.

1252611863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7240704.

The product of its digits is 17280, while the sum is 35.

The square root of 1252611863 is about 35392.2571051918. The cubic root of 1252611863 is about 1077.9671014889.

It can be divided in two parts, 12526 and 11863, that added together give a cube (24389 = 29³).

The spelling of 1252611863 in words is "one billion, two hundred fifty-two million, six hundred eleven thousand, eight hundred sixty-three".