1142661531 has 8 divisors (see below), whose sum is σ = 1662053184. Its totient is φ = 692522120.

The previous prime is 1142661479. The next prime is 1142661547. The reversal of 1142661531 is 1351662411.

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 not a de Polignac number, because 1142661531 - 2⁹ = 1142661019 is a prime.

It is a super-2 number, since 2×1142661531² = 2611350748854527922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1142661131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17313021 + ... + 17313086.

It is an arithmetic number, because the mean of its divisors is an integer number (207756648).

Almost surely, 2^1142661531 is an apocalyptic number.

1142661531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1142661531 is a deficient number, since it is larger than the sum of its proper divisors (519391653).

1142661531 is a wasteful number, since it uses less digits than its factorization.

1142661531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34626121.

The product of its digits is 4320, while the sum is 30.

The square root of 1142661531 is about 33803.2769269490. The cubic root of 1142661531 is about 1045.4562634470.

The spelling of 1142661531 in words is "one billion, one hundred forty-two million, six hundred sixty-one thousand, five hundred thirty-one".