142870969 has 2 divisors, whose sum is σ = 142870970. Its totient is φ = 142870968.

The previous prime is 142870961. The next prime is 142870979. The reversal of 142870969 is 969078241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125731369 + 17139600 = 11213^2 + 4140^2 .

It is an emirp because it is prime and its reverse (969078241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142870969 - 2³ = 142870961 is a prime.

It is a super-2 number, since 2×142870969² = 40824227565997922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142870961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71435484 + 71435485.

It is an arithmetic number, because the mean of its divisors is an integer number (71435485).

Almost surely, 2^142870969 is an apocalyptic number.

It is an amenable number.

142870969 is a deficient number, since it is larger than the sum of its proper divisors (1).

142870969 is an equidigital number, since it uses as much as digits as its factorization.

142870969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 142870969 is about 11952.8644684025. The cubic root of 142870969 is about 522.7748227252.

The spelling of 142870969 in words is "one hundred forty-two million, eight hundred seventy thousand, nine hundred sixty-nine".