1142531 has 4 divisors (see below), whose sum is σ = 1230432. Its totient is φ = 1054632.

The previous prime is 1142509. The next prime is 1142539. The reversal of 1142531 is 1352411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1352411 = 163 ⋅8297.

It is a cyclic number.

It is not a de Polignac number, because 1142531 - 2¹⁰ = 1141507 is a prime.

It is a super-2 number, since 2×1142531² = 2610754171922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142539) 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, 43931 + ... + 43956.

It is an arithmetic number, because the mean of its divisors is an integer number (307608).

2^1142531 is an apocalyptic number.

1142531 is a deficient number, since it is larger than the sum of its proper divisors (87901).

1142531 is an equidigital number, since it uses as much as digits as its factorization.

1142531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87900.

The product of its digits is 120, while the sum is 17.

The square root of 1142531 is about 1068.8924174116. The cubic root of 1142531 is about 104.5416452986.

Subtracting from 1142531 its product of digits (120), we obtain a palindrome (1142411).

Adding to 1142531 its reverse (1352411), we get a palindrome (2494942).

The spelling of 1142531 in words is "one million, one hundred forty-two thousand, five hundred thirty-one".