142999917 has 4 divisors (see below), whose sum is σ = 190666560. Its totient is φ = 95333276.

The previous prime is 142999907. The next prime is 142999933. The reversal of 142999917 is 719999241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142999917 - 2¹² = 142995821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142999917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142999907) 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, 23833317 + ... + 23833322.

It is an arithmetic number, because the mean of its divisors is an integer number (47666640).

Almost surely, 2^142999917 is an apocalyptic number.

It is an amenable number.

142999917 is a deficient number, since it is larger than the sum of its proper divisors (47666643).

142999917 is an equidigital number, since it uses as much as digits as its factorization.

142999917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47666642.

The product of its digits is 367416, while the sum is 51.

The square root of 142999917 is about 11958.2572726966. The cubic root of 142999917 is about 522.9320520022.

It can be divided in two parts, 142999 and 917, that added together give a triangular number (143916 = T₅₃₆).

The spelling of 142999917 in words is "one hundred forty-two million, nine hundred ninety-nine thousand, nine hundred seventeen".