1142731237 has 2 divisors, whose sum is σ = 1142731238. Its totient is φ = 1142731236.

The previous prime is 1142731201. The next prime is 1142731243. The reversal of 1142731237 is 7321372411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1109622721 + 33108516 = 33311^2 + 5754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142731237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1142731199 and 1142731208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142731277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571365618 + 571365619.

It is an arithmetic number, because the mean of its divisors is an integer number (571365619).

Almost surely, 2^1142731237 is an apocalyptic number.

It is an amenable number.

1142731237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142731237 is an equidigital number, since it uses as much as digits as its factorization.

1142731237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 31.

The square root of 1142731237 is about 33804.3079651100. The cubic root of 1142731237 is about 1045.4775217376.

The spelling of 1142731237 in words is "one billion, one hundred forty-two million, seven hundred thirty-one thousand, two hundred thirty-seven".