142066431 has 24 divisors (see below), whose sum is σ = 221531856. Its totient is φ = 87212160.

The previous prime is 142066427. The next prime is 142066471. The reversal of 142066431 is 134660241.

142066431 is a `hidden beast` number, since 14 + 2 + 0 + 6 + 643 + 1 = 666.

It is not a de Polignac number, because 142066431 - 2² = 142066427 is a prime.

It is a super-2 number, since 2×142066431² = 40365741634155522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142066395 and 142066404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142066471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56211 + ... + 58683.

It is an arithmetic number, because the mean of its divisors is an integer number (9230494).

Almost surely, 2^142066431 is an apocalyptic number.

142066431 is a deficient number, since it is larger than the sum of its proper divisors (79465425).

142066431 is a wasteful number, since it uses less digits than its factorization.

142066431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983 (or 2980 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 142066431 is about 11919.1623447288. The cubic root of 142066431 is about 521.7916881411.

The spelling of 142066431 in words is "one hundred forty-two million, sixty-six thousand, four hundred thirty-one".