142161251 has 2 divisors, whose sum is σ = 142161252. Its totient is φ = 142161250.

The previous prime is 142161223. The next prime is 142161281. The reversal of 142161251 is 152161241.

142161251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142161251 is a prime.

It is not a weakly prime, because it can be changed into another prime (142161281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71080625 + 71080626.

It is an arithmetic number, because the mean of its divisors is an integer number (71080626).

Almost surely, 2^142161251 is an apocalyptic number.

142161251 is a deficient number, since it is larger than the sum of its proper divisors (1).

142161251 is an equidigital number, since it uses as much as digits as its factorization.

142161251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 23.

The square root of 142161251 is about 11923.1393097623. The cubic root of 142161251 is about 521.9077495362.

The spelling of 142161251 in words is "one hundred forty-two million, one hundred sixty-one thousand, two hundred fifty-one".