2142531 has 14 divisors (see below), whose sum is σ = 3213420. Its totient is φ = 1427868.

The previous prime is 2142529. The next prime is 2142533. The reversal of 2142531 is 1352412.

It is an interprime number because it is at equal distance from previous prime (2142529) and next prime (2142533).

It is not a de Polignac number, because 2142531 - 2¹ = 2142529 is a prime.

It is a super-2 number, since 2×2142531² = 9180878171922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2142533) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 741 + ... + 2198.

It is an arithmetic number, because the mean of its divisors is an integer number (229530).

2^2142531 is an apocalyptic number.

2142531 is a deficient number, since it is larger than the sum of its proper divisors (1070889).

2142531 is an frugal number, since it uses more digits than its factorization.

2142531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957 (or 2942 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2142531 is about 1463.7387061904. The cubic root of 2142531 is about 128.9166579034.

Adding to 2142531 its reverse (1352412), we get a palindrome (3494943).

The spelling of 2142531 in words is "two million, one hundred forty-two thousand, five hundred thirty-one".