142478569 has 8 divisors (see below), whose sum is σ = 145080000. Its totient is φ = 139883472.

The previous prime is 142478563. The next prime is 142478603. The reversal of 142478569 is 965874241.

142478569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 142478569 - 2⁹ = 142478057 is a prime.

It is a super-2 number, since 2×142478569² = 40600285248575522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142478563) 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, 90612 + ... + 92170.

It is an arithmetic number, because the mean of its divisors is an integer number (18135000).

Almost surely, 2^142478569 is an apocalyptic number.

It is an amenable number.

142478569 is a deficient number, since it is larger than the sum of its proper divisors (2601431).

142478569 is a wasteful number, since it uses less digits than its factorization.

142478569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167.

The product of its digits is 483840, while the sum is 46.

The square root of 142478569 is about 11936.4387067500. The cubic root of 142478569 is about 522.2957775791.

The spelling of 142478569 in words is "one hundred forty-two million, four hundred seventy-eight thousand, five hundred sixty-nine".