142155061 has 4 divisors (see below), whose sum is σ = 142427392. Its totient is φ = 141882732.

The previous prime is 142155059. The next prime is 142155067. The reversal of 142155061 is 160551241.

It is a happy number.

142155061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 142155061 - 2¹ = 142155059 is a prime.

It is a super-2 number, since 2×142155061² = 40416122735827442, 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 (142155067) 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, 135381 + ... + 136426.

It is an arithmetic number, because the mean of its divisors is an integer number (35606848).

Almost surely, 2^142155061 is an apocalyptic number.

It is an amenable number.

142155061 is a deficient number, since it is larger than the sum of its proper divisors (272331).

142155061 is an equidigital number, since it uses as much as digits as its factorization.

142155061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272330.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 142155061 is about 11922.8797276497. The cubic root of 142155061 is about 521.9001744391.

The spelling of 142155061 in words is "one hundred forty-two million, one hundred fifty-five thousand, sixty-one".