142974487 has 4 divisors (see below), whose sum is σ = 150499480. Its totient is φ = 135449496.

The previous prime is 142974479. The next prime is 142974499. The reversal of 142974487 is 784479241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142974487 - 2³ = 142974479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142974407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3762468 + ... + 3762505.

It is an arithmetic number, because the mean of its divisors is an integer number (37624870).

Almost surely, 2^142974487 is an apocalyptic number.

142974487 is a deficient number, since it is larger than the sum of its proper divisors (7524993).

142974487 is an equidigital number, since it uses as much as digits as its factorization.

142974487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524992.

The product of its digits is 451584, while the sum is 46.

The square root of 142974487 is about 11957.1939433966. The cubic root of 142974487 is about 522.9010520998.

The spelling of 142974487 in words is "one hundred forty-two million, nine hundred seventy-four thousand, four hundred eighty-seven".