1131421075 has 6 divisors (see below), whose sum is σ = 1402962164. Its totient is φ = 905136840.

The previous prime is 1131421069. The next prime is 1131421097. The reversal of 1131421075 is 5701241311.

It is not a de Polignac number, because 1131421075 - 2⁷ = 1131420947 is a prime.

It is a super-2 number, since 2×1131421075² = 2560227297908311250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 45256843 = 1131421075 / (1 + 1 + 3 + 1 + 4 + 2 + 1 + 0 + 7 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22628397 + ... + 22628446.

Almost surely, 2^1131421075 is an apocalyptic number.

1131421075 is a deficient number, since it is larger than the sum of its proper divisors (271541089).

1131421075 is an equidigital number, since it uses as much as digits as its factorization.

1131421075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45256853 (or 45256848 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1131421075 is about 33636.6032024638. The cubic root of 1131421075 is about 1042.0168809272.

Adding to 1131421075 its reverse (5701241311), we get a palindrome (6832662386).

The spelling of 1131421075 in words is "one billion, one hundred thirty-one million, four hundred twenty-one thousand, seventy-five".