1142520331 has 8 divisors (see below), whose sum is σ = 1254942720. Its totient is φ = 1035326952.

The previous prime is 1142520317. The next prime is 1142520347. The reversal of 1142520331 is 1330252411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142520331 is a prime.

It is a super-2 number, since 2×1142520331² = 2610705413496699122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142523331) 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 in 7 ways as a sum of consecutive naturals, for example, 1306795 + ... + 1307668.

It is an arithmetic number, because the mean of its divisors is an integer number (156867840).

Almost surely, 2^1142520331 is an apocalyptic number.

1142520331 is a deficient number, since it is larger than the sum of its proper divisors (112422389).

1142520331 is a wasteful number, since it uses less digits than its factorization.

1142520331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614505.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1142520331 is about 33801.1883075137. The cubic root of 1142520331 is about 1045.4131989287.

Adding to 1142520331 its reverse (1330252411), we get a palindrome (2472772742).

The spelling of 1142520331 in words is "one billion, one hundred forty-two million, five hundred twenty thousand, three hundred thirty-one".