1131432420 has 48 divisors (see below), whose sum is σ = 3270210048. Its totient is φ = 291982080.

The previous prime is 1131432409. The next prime is 1131432427. The reversal of 1131432420 is 242341311.

It is not an unprimeable number, because it can be changed into a prime (1131432427) 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 15 ways as a sum of consecutive naturals, for example, 302289 + ... + 306008.

It is an arithmetic number, because the mean of its divisors is an integer number (68129376).

Almost surely, 2^1131432420 is an apocalyptic number.

1131432420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131432420 is an abundant number, since it is smaller than the sum of its proper divisors (2138777628).

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

1131432420 is a wasteful number, since it uses less digits than its factorization.

1131432420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608340 (or 608338 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1131432420 is about 33636.7718427319. The cubic root of 1131432420 is about 1042.0203637573.

Adding to 1131432420 its reverse (242341311), we get a palindrome (1373773731).

It can be divided in two parts, 11314 and 32420, that added together give a palindrome (43734).

The spelling of 1131432420 in words is "one billion, one hundred thirty-one million, four hundred thirty-two thousand, four hundred twenty".