1151131427 has 4 divisors (see below), whose sum is σ = 1170002496. Its totient is φ = 1132260360.

The previous prime is 1151131417. The next prime is 1151131483. The reversal of 1151131427 is 7241311511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1151131427 - 2⁴ = 1151131411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1151131396 and 1151131405.

It is not an unprimeable number, because it can be changed into a prime (1151131417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9435443 + ... + 9435564.

It is an arithmetic number, because the mean of its divisors is an integer number (292500624).

Almost surely, 2^1151131427 is an apocalyptic number.

1151131427 is a deficient number, since it is larger than the sum of its proper divisors (18871069).

1151131427 is an equidigital number, since it uses as much as digits as its factorization.

1151131427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18871068.

The product of its digits is 840, while the sum is 26.

The square root of 1151131427 is about 33928.3277955162. The cubic root of 1151131427 is about 1048.0330301901.

Adding to 1151131427 its reverse (7241311511), we get a palindrome (8392442938).

The spelling of 1151131427 in words is "one billion, one hundred fifty-one million, one hundred thirty-one thousand, four hundred twenty-seven".