142679891 has 4 divisors (see below), whose sum is σ = 145998072. Its totient is φ = 139361712.

The previous prime is 142679851. The next prime is 142679897. The reversal of 142679891 is 198976241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198976241 = 1301 ⋅152941.

It is a cyclic number.

It is not a de Polignac number, because 142679891 - 2¹⁸ = 142417747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142679897) 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, 1659026 + ... + 1659111.

It is an arithmetic number, because the mean of its divisors is an integer number (36499518).

Almost surely, 2^142679891 is an apocalyptic number.

142679891 is a deficient number, since it is larger than the sum of its proper divisors (3318181).

142679891 is an equidigital number, since it uses as much as digits as its factorization.

142679891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3318180.

The product of its digits is 217728, while the sum is 47.

The square root of 142679891 is about 11944.8688146836. The cubic root of 142679891 is about 522.5416628485.

The spelling of 142679891 in words is "one hundred forty-two million, six hundred seventy-nine thousand, eight hundred ninety-one".