142402987 has 2 divisors, whose sum is σ = 142402988. Its totient is φ = 142402986.

The previous prime is 142402969. The next prime is 142402991. The reversal of 142402987 is 789204241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142402987 - 2²³ = 134014379 is a prime.

It is a super-2 number, since 2×142402987² = 40557221413044338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142402907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71201493 + 71201494.

It is an arithmetic number, because the mean of its divisors is an integer number (71201494).

Almost surely, 2^142402987 is an apocalyptic number.

142402987 is a deficient number, since it is larger than the sum of its proper divisors (1).

142402987 is an equidigital number, since it uses as much as digits as its factorization.

142402987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 142402987 is about 11933.2722670691. The cubic root of 142402987 is about 522.2034054602.

The spelling of 142402987 in words is "one hundred forty-two million, four hundred two thousand, nine hundred eighty-seven".