142778479 has 2 divisors, whose sum is σ = 142778480. Its totient is φ = 142778478.

The previous prime is 142778453. The next prime is 142778507. The reversal of 142778479 is 974877241.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142778479 - 2⁷ = 142778351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142778429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71389239 + 71389240.

It is an arithmetic number, because the mean of its divisors is an integer number (71389240).

Almost surely, 2^142778479 is an apocalyptic number.

142778479 is a deficient number, since it is larger than the sum of its proper divisors (1).

142778479 is an equidigital number, since it uses as much as digits as its factorization.

142778479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 49.

The square root of 142778479 is about 11948.9948949692. The cubic root of 142778479 is about 522.6619892569.

The spelling of 142778479 in words is "one hundred forty-two million, seven hundred seventy-eight thousand, four hundred seventy-nine".