142206431 has 8 divisors (see below), whose sum is σ = 150366720. Its totient is φ = 134113752.

The previous prime is 142206413. The next prime is 142206457. The reversal of 142206431 is 134602241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142206431 - 2¹⁰ = 142205407 is a prime.

It is a super-2 number, since 2×142206431² = 40445338035515522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142206397 and 142206406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142206131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12545 + ... + 21018.

It is an arithmetic number, because the mean of its divisors is an integer number (18795840).

Almost surely, 2^142206431 is an apocalyptic number.

142206431 is a deficient number, since it is larger than the sum of its proper divisors (8160289).

142206431 is a wasteful number, since it uses less digits than its factorization.

142206431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33805.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 142206431 is about 11925.0337945014. The cubic root of 142206431 is about 521.9630325205.

Adding to 142206431 its reverse (134602241), we get a palindrome (276808672).

The spelling of 142206431 in words is "one hundred forty-two million, two hundred six thousand, four hundred thirty-one".