142639099 has 8 divisors (see below), whose sum is σ = 150258240. Its totient is φ = 135031176.

The previous prime is 142639097. The next prime is 142639171. The reversal of 142639099 is 990936241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142639099 - 2¹ = 142639097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142639093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40944 + ... + 44290.

It is an arithmetic number, because the mean of its divisors is an integer number (18782280).

Almost surely, 2^142639099 is an apocalyptic number.

142639099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

142639099 is a deficient number, since it is larger than the sum of its proper divisors (7619141).

142639099 is a wasteful number, since it uses less digits than its factorization.

142639099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 142639099 is about 11943.1611811949. The cubic root of 142639099 is about 522.4918601023.

The spelling of 142639099 in words is "one hundred forty-two million, six hundred thirty-nine thousand, ninety-nine".