142578399 has 8 divisors (see below), whose sum is σ = 190624000. Its totient is φ = 94792536.

The previous prime is 142578391. The next prime is 142578407. The reversal of 142578399 is 993875241.

It is an interprime number because it is at equal distance from previous prime (142578391) and next prime (142578407).

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

It is not a de Polignac number, because 142578399 - 2³ = 142578391 is a prime.

It is a super-2 number, since 2×142578399² = 40657199722806402, 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 (142578391) 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, 63649 + ... + 65850.

It is an arithmetic number, because the mean of its divisors is an integer number (23828000).

Almost surely, 2^142578399 is an apocalyptic number.

142578399 is a deficient number, since it is larger than the sum of its proper divisors (48045601).

142578399 is a wasteful number, since it uses less digits than its factorization.

142578399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129869.

The product of its digits is 544320, while the sum is 48.

The square root of 142578399 is about 11940.6197075361. The cubic root of 142578399 is about 522.4177341999.

The spelling of 142578399 in words is "one hundred forty-two million, five hundred seventy-eight thousand, three hundred ninety-nine".