1142505331 has 4 divisors (see below), whose sum is σ = 1246369464. Its totient is φ = 1038641200.

The previous prime is 1142505319. The next prime is 1142505337. The reversal of 1142505331 is 1335052411.

It is a happy number.

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 1142505331 - 2²¹ = 1140408179 is a prime.

It is a super-2 number, since 2×1142505331² = 2610636862726839122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1142505296 and 1142505305.

It is not an unprimeable number, because it can be changed into a prime (1142505337) 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, 51932050 + ... + 51932071.

It is an arithmetic number, because the mean of its divisors is an integer number (311592366).

Almost surely, 2^1142505331 is an apocalyptic number.

1142505331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1142505331 is a deficient number, since it is larger than the sum of its proper divisors (103864133).

1142505331 is a wasteful number, since it uses less digits than its factorization.

1142505331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103864132.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1142505331 is about 33800.9664210951. The cubic root of 1142505331 is about 1045.4086238776.

Adding to 1142505331 its reverse (1335052411), we get a palindrome (2477557742).

The spelling of 1142505331 in words is "one billion, one hundred forty-two million, five hundred five thousand, three hundred thirty-one".