142257770 has 16 divisors (see below), whose sum is σ = 256356360. Its totient is φ = 56838144.

The previous prime is 142257763. The next prime is 142257779. The reversal of 142257770 is 77752241.

It can be written as a sum of positive squares in 4 ways, for example, as 21279769 + 120978001 = 4613^2 + 10999^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 142257770.

It is not an unprimeable number, because it can be changed into a prime (142257779) 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, 1634 + ... + 16946.

Almost surely, 2^142257770 is an apocalyptic number.

142257770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142257770 is a deficient number, since it is larger than the sum of its proper divisors (114098590).

142257770 is a wasteful number, since it uses less digits than its factorization.

142257770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16249.

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 142257770 is about 11927.1861727735. The cubic root of 142257770 is about 522.0258375471.

The spelling of 142257770 in words is "one hundred forty-two million, two hundred fifty-seven thousand, seven hundred seventy".