142778507 has 2 divisors, whose sum is σ = 142778508. Its totient is φ = 142778506.

The previous prime is 142778479. The next prime is 142778539. The reversal of 142778507 is 705877241.

It is a weak prime.

It is an emirp because it is prime and its reverse (705877241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142778507 - 2⁶ = 142778443 is a prime.

It is a super-2 number, since 2×142778507² = 40771404122298098, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142778557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71389253 + 71389254.

It is an arithmetic number, because the mean of its divisors is an integer number (71389254).

Almost surely, 2^142778507 is an apocalyptic number.

142778507 is a deficient number, since it is larger than the sum of its proper divisors (1).

142778507 is an equidigital number, since it uses as much as digits as its factorization.

142778507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109760, while the sum is 41.

The square root of 142778507 is about 11948.9960666158. The cubic root of 142778507 is about 522.6620234230.

The spelling of 142778507 in words is "one hundred forty-two million, seven hundred seventy-eight thousand, five hundred seven".