142505869 has 8 divisors (see below), whose sum is σ = 155564640. Its totient is φ = 129464400.

The previous prime is 142505807. The next prime is 142505899. The reversal of 142505869 is 968505241.

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 142505869 - 2²³ = 134117261 is a prime.

It is a super-2 number, since 2×142505869² = 40615845398890322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142505899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17887 + ... + 24595.

It is an arithmetic number, because the mean of its divisors is an integer number (19445580).

Almost surely, 2^142505869 is an apocalyptic number.

It is an amenable number.

142505869 is a deficient number, since it is larger than the sum of its proper divisors (13058771).

142505869 is a wasteful number, since it uses less digits than its factorization.

142505869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8651.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 142505869 is about 11937.5822091410. The cubic root of 142505869 is about 522.3291340907.

The spelling of 142505869 in words is "one hundred forty-two million, five hundred five thousand, eight hundred sixty-nine".