142894569 has 4 divisors (see below), whose sum is σ = 190526096. Its totient is φ = 95263044.

The previous prime is 142894567. The next prime is 142894603. The reversal of 142894569 is 965498241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 965498241 = 3 ⋅321832747.

It is not a de Polignac number, because 142894569 - 2¹ = 142894567 is a prime.

It is a super-2 number, since 2×142894569² = 40837715699391522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142894567) 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, 23815759 + ... + 23815764.

It is an arithmetic number, because the mean of its divisors is an integer number (47631524).

Almost surely, 2^142894569 is an apocalyptic number.

It is an amenable number.

142894569 is a deficient number, since it is larger than the sum of its proper divisors (47631527).

142894569 is an equidigital number, since it uses as much as digits as its factorization.

142894569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47631526.

The product of its digits is 622080, while the sum is 48.

The square root of 142894569 is about 11953.8516386979. The cubic root of 142894569 is about 522.8036058214.

The spelling of 142894569 in words is "one hundred forty-two million, eight hundred ninety-four thousand, five hundred sixty-nine".