142430021491 has 2 divisors, whose sum is σ = 142430021492. Its totient is φ = 142430021490.

The previous prime is 142430021477. The next prime is 142430021507. The reversal of 142430021491 is 194120034241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142430021491 - 2²¹ = 142427924339 is a prime.

It is a super-2 number, since 2×142430021491² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142430021891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71215010745 + 71215010746.

It is an arithmetic number, because the mean of its divisors is an integer number (71215010746).

Almost surely, 2^142430021491 is an apocalyptic number.

142430021491 is a deficient number, since it is larger than the sum of its proper divisors (1).

142430021491 is an equidigital number, since it uses as much as digits as its factorization.

142430021491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 142430021491 in words is "one hundred forty-two billion, four hundred thirty million, twenty-one thousand, four hundred ninety-one".