1249522818 has 16 divisors (see below), whose sum is σ = 2500085856. Its totient is φ = 416334240.

The previous prime is 1249522811. The next prime is 1249522829. The reversal of 1249522818 is 8182259421.

It is a super-2 number, since 2×1249522818² = 3122614545405322248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1249522818.

It is not an unprimeable number, because it can be changed into a prime (1249522811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27268 + ... + 56943.

It is an arithmetic number, because the mean of its divisors is an integer number (156255366).

Almost surely, 2^1249522818 is an apocalyptic number.

1249522818 is an abundant number, since it is smaller than the sum of its proper divisors (1250563038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1249522818 is a wasteful number, since it uses less digits than its factorization.

1249522818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86689.

The product of its digits is 92160, while the sum is 42.

The square root of 1249522818 is about 35348.5900426028. The cubic root of 1249522818 is about 1077.0802532425.

The spelling of 1249522818 in words is "one billion, two hundred forty-nine million, five hundred twenty-two thousand, eight hundred eighteen".