1142731757 has 4 divisors (see below), whose sum is σ = 1142828220. Its totient is φ = 1142635296.

The previous prime is 1142731697. The next prime is 1142731769. The reversal of 1142731757 is 7571372411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 424813321 + 717918436 = 20611^2 + 26794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142731757 - 2⁸ = 1142731501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1142731757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142731157) 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, 27488 + ... + 55145.

It is an arithmetic number, because the mean of its divisors is an integer number (285707055).

Almost surely, 2^1142731757 is an apocalyptic number.

It is an amenable number.

1142731757 is a deficient number, since it is larger than the sum of its proper divisors (96463).

1142731757 is an equidigital number, since it uses as much as digits as its factorization.

1142731757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96462.

The product of its digits is 41160, while the sum is 38.

The square root of 1142731757 is about 33804.3156564365. The cubic root of 1142731757 is about 1045.4776803191.

The spelling of 1142731757 in words is "one billion, one hundred forty-two million, seven hundred thirty-one thousand, seven hundred fifty-seven".