142691674 has 4 divisors (see below), whose sum is σ = 214037514. Its totient is φ = 71345836.

The previous prime is 142691663. The next prime is 142691683. The reversal of 142691674 is 476196241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 476196241 = 6287 ⋅75743.

It can be written as a sum of positive squares in only one way, i.e., 142683025 + 8649 = 11945^2 + 93^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35672917 + ... + 35672920.

Almost surely, 2^142691674 is an apocalyptic number.

142691674 is a deficient number, since it is larger than the sum of its proper divisors (71345840).

142691674 is an equidigital number, since it uses as much as digits as its factorization.

142691674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71345839.

The product of its digits is 72576, while the sum is 40.

The square root of 142691674 is about 11945.3620288378. The cubic root of 142691674 is about 522.5560468865.

The spelling of 142691674 in words is "one hundred forty-two million, six hundred ninety-one thousand, six hundred seventy-four".