142947659 has 4 divisors (see below), whose sum is σ = 150471240. Its totient is φ = 135424080.

The previous prime is 142947653. The next prime is 142947661. The reversal of 142947659 is 956749241.

142947659 = 1921² + 1922² + ... + 1958².

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 142947659 - 2⁴ = 142947643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142947653) 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, 3761762 + ... + 3761799.

It is an arithmetic number, because the mean of its divisors is an integer number (37617810).

Almost surely, 2^142947659 is an apocalyptic number.

142947659 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

142947659 is a deficient number, since it is larger than the sum of its proper divisors (7523581).

142947659 is an equidigital number, since it uses as much as digits as its factorization.

142947659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7523580.

The product of its digits is 544320, while the sum is 47.

The square root of 142947659 is about 11956.0720556544. The cubic root of 142947659 is about 522.8683440102.

The spelling of 142947659 in words is "one hundred forty-two million, nine hundred forty-seven thousand, six hundred fifty-nine".