142249457 has 8 divisors (see below), whose sum is σ = 169639296. Its totient is φ = 116626752.

The previous prime is 142249453. The next prime is 142249477. The reversal of 142249457 is 754942241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142249457 - 2² = 142249453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142249457.

It is not an unprimeable number, because it can be changed into a prime (142249453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441608 + ... + 441929.

It is an arithmetic number, because the mean of its divisors is an integer number (21204912).

Almost surely, 2^142249457 is an apocalyptic number.

It is an amenable number.

142249457 is a deficient number, since it is larger than the sum of its proper divisors (27389839).

142249457 is an equidigital number, since it uses as much as digits as its factorization.

142249457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883567.

The product of its digits is 80640, while the sum is 38.

The square root of 142249457 is about 11926.8376781107. The cubic root of 142249457 is about 522.0156689512.

The spelling of 142249457 in words is "one hundred forty-two million, two hundred forty-nine thousand, four hundred fifty-seven".