1142131531 has 2 divisors, whose sum is σ = 1142131532. Its totient is φ = 1142131530.

The previous prime is 1142131469. The next prime is 1142131559. The reversal of 1142131531 is 1351312411.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1142131531 - 2⁹ = 1142131019 is a prime.

It is a super-2 number, since 2×1142131531² = 2608928868208807922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1142131031) 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 as a sum of consecutive naturals, namely, 571065765 + 571065766.

It is an arithmetic number, because the mean of its divisors is an integer number (571065766).

Almost surely, 2^1142131531 is an apocalyptic number.

1142131531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142131531 is an equidigital number, since it uses as much as digits as its factorization.

1142131531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 22.

The square root of 1142131531 is about 33795.4365410480. The cubic root of 1142131531 is about 1045.2946006698.

Adding to 1142131531 its reverse (1351312411), we get a palindrome (2493443942).

The spelling of 1142131531 in words is "one billion, one hundred forty-two million, one hundred thirty-one thousand, five hundred thirty-one".