242631 has 6 divisors (see below), whose sum is σ = 350480. Its totient is φ = 161748.

The previous prime is 242629. The next prime is 242633. The reversal of 242631 is 136242.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (242629) and next prime (242633).

It is not a de Polignac number, because 242631 - 2¹ = 242629 is a prime.

It is a super-2 number, since 2×242631² = 117739604322, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13471 + ... + 13488.

2²⁴²⁶³¹ is an apocalyptic number.

242631 is a deficient number, since it is larger than the sum of its proper divisors (107849).

242631 is a wasteful number, since it uses less digits than its factorization.

242631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26965 (or 26962 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 242631 is about 492.5758824790. The cubic root of 242631 is about 62.3709122318.

Adding to 242631 its reverse (136242), we get a palindrome (378873).

The spelling of 242631 in words is "two hundred forty-two thousand, six hundred thirty-one".