142505111 has 12 divisors (see below), whose sum is σ = 171888912. Its totient is φ = 115716384.

The previous prime is 142505087. The next prime is 142505113. The reversal of 142505111 is 111505241.

It is not a de Polignac number, because 142505111 - 2¹⁴ = 142488727 is a prime.

It is a super-2 number, since 2×142505111² = 40615413322244642, 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 (142505113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25670 + ... + 30723.

It is an arithmetic number, because the mean of its divisors is an integer number (14324076).

Almost surely, 2^142505111 is an apocalyptic number.

142505111 is a deficient number, since it is larger than the sum of its proper divisors (29383801).

142505111 is an equidigital number, since it uses as much as digits as its factorization.

142505111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56438 (or 56419 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 142505111 is about 11937.5504606263. The cubic root of 142505111 is about 522.3282079858.

The spelling of 142505111 in words is "one hundred forty-two million, five hundred five thousand, one hundred eleven".