1244621631 has 32 divisors (see below), whose sum is σ = 1849858560. Its totient is φ = 737942400.

The previous prime is 1244621597. The next prime is 1244621633. The reversal of 1244621631 is 1361264421.

It is not a de Polignac number, because 1244621631 - 2¹¹ = 1244619583 is a prime.

It is a super-2 number, since 2×1244621631² = 3098166008706200322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244621633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 767001 + ... + 768621.

It is an arithmetic number, because the mean of its divisors is an integer number (57808080).

Almost surely, 2^1244621631 is an apocalyptic number.

1244621631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1244621631 is a deficient number, since it is larger than the sum of its proper divisors (605236929).

1244621631 is a wasteful number, since it uses less digits than its factorization.

1244621631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127.

The product of its digits is 6912, while the sum is 30.

The square root of 1244621631 is about 35279.1954415063. The cubic root of 1244621631 is about 1075.6701445457.

The spelling of 1244621631 in words is "one billion, two hundred forty-four million, six hundred twenty-one thousand, six hundred thirty-one".