142212431 has 4 divisors (see below), whose sum is σ = 142236432. Its totient is φ = 142188432.

The previous prime is 142212419. The next prime is 142212443. The reversal of 142212431 is 134212241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (142212419) and next prime (142212443).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142212431 is a prime.

It is a super-2 number, since 2×142212431² = 40448751061859522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142212461) 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, 3995 + ... + 17331.

It is an arithmetic number, because the mean of its divisors is an integer number (35559108).

Almost surely, 2^142212431 is an apocalyptic number.

142212431 is a deficient number, since it is larger than the sum of its proper divisors (24001).

142212431 is a wasteful number, since it uses less digits than its factorization.

142212431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24000.

The product of its digits is 384, while the sum is 20.

The square root of 142212431 is about 11925.2853634620. The cubic root of 142212431 is about 521.9703733375.

Adding to 142212431 its reverse (134212241), we get a palindrome (276424672).

The spelling of 142212431 in words is "one hundred forty-two million, two hundred twelve thousand, four hundred thirty-one".