142040431 has 4 divisors (see below), whose sum is σ = 152966632. Its totient is φ = 131114232.

The previous prime is 142040413. The next prime is 142040449. The reversal of 142040431 is 134040241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134040241 = 61 ⋅2197381.

It is an interprime number because it is at equal distance from previous prime (142040413) and next prime (142040449).

It is a cyclic number.

It is not a de Polignac number, because 142040431 - 2⁷ = 142040303 is a prime.

It is a super-2 number, since 2×142040431² = 40350968077331522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142040399 and 142040408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142040401) 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, 5463081 + ... + 5463106.

It is an arithmetic number, because the mean of its divisors is an integer number (38241658).

Almost surely, 2^142040431 is an apocalyptic number.

142040431 is a deficient number, since it is larger than the sum of its proper divisors (10926201).

142040431 is a wasteful number, since it uses less digits than its factorization.

142040431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10926200.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 142040431 is about 11918.0716141497. The cubic root of 142040431 is about 521.7598546495.

Adding to 142040431 its reverse (134040241), we get a palindrome (276080672).

The spelling of 142040431 in words is "one hundred forty-two million, forty thousand, four hundred thirty-one".