142207999 has 4 divisors (see below), whose sum is σ = 142293400. Its totient is φ = 142122600.

The previous prime is 142207993. The next prime is 142208021. The reversal of 142207999 is 999702241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999702241 = 103 ⋅9705847.

It is a cyclic number.

It is not a de Polignac number, because 142207999 - 2⁹ = 142207487 is a prime.

It is a super-2 number, since 2×142207999² = 40446229959168002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142207993) 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, 40152 + ... + 43549.

It is an arithmetic number, because the mean of its divisors is an integer number (35573350).

Almost surely, 2^142207999 is an apocalyptic number.

142207999 is a deficient number, since it is larger than the sum of its proper divisors (85401).

142207999 is an equidigital number, since it uses as much as digits as its factorization.

142207999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85400.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 142207999 is about 11925.0995383686. The cubic root of 142207999 is about 521.9649509406.

The spelling of 142207999 in words is "one hundred forty-two million, two hundred seven thousand, nine hundred ninety-nine".