1131432621 has 32 divisors (see below), whose sum is σ = 1677680640. Its totient is φ = 672508800.

The previous prime is 1131432619. The next prime is 1131432623. The reversal of 1131432621 is 1262341311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1131432619) and next prime (1131432623).

It is not a de Polignac number, because 1131432621 - 2¹ = 1131432619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131432591 and 1131432600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131432623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 458890 + ... + 461348.

It is an arithmetic number, because the mean of its divisors is an integer number (52427520).

Almost surely, 2^1131432621 is an apocalyptic number.

1131432621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1131432621 is a deficient number, since it is larger than the sum of its proper divisors (546248019).

1131432621 is a wasteful number, since it uses less digits than its factorization.

1131432621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737.

The product of its digits is 864, while the sum is 24.

The square root of 1131432621 is about 33636.7748305333. The cubic root of 1131432621 is about 1042.0204254626.

Adding to 1131432621 its reverse (1262341311), we get a palindrome (2393773932).

The spelling of 1131432621 in words is "one billion, one hundred thirty-one million, four hundred thirty-two thousand, six hundred twenty-one".