142578481 has 2 divisors, whose sum is σ = 142578482. Its totient is φ = 142578480.

The previous prime is 142578433. The next prime is 142578509. The reversal of 142578481 is 184875241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107827456 + 34751025 = 10384^2 + 5895^2 .

It is a cyclic number.

It is not a de Polignac number, because 142578481 - 2¹³ = 142570289 is a prime.

It is a super-2 number, since 2×142578481² = 40657246488534722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142578281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71289240 + 71289241.

It is an arithmetic number, because the mean of its divisors is an integer number (71289241).

Almost surely, 2^142578481 is an apocalyptic number.

It is an amenable number.

142578481 is a deficient number, since it is larger than the sum of its proper divisors (1).

142578481 is an equidigital number, since it uses as much as digits as its factorization.

142578481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71680, while the sum is 40.

The square root of 142578481 is about 11940.6231411933. The cubic root of 142578481 is about 522.4178343512.

The spelling of 142578481 in words is "one hundred forty-two million, five hundred seventy-eight thousand, four hundred eighty-one".