142775620 has 48 divisors (see below), whose sum is σ = 326149488. Its totient is φ = 52185600.

The previous prime is 142775603. The next prime is 142775621. The reversal of 142775620 is 26577241.

It can be written as a sum of positive squares in 8 ways, for example, as 498436 + 142277184 = 706^2 + 11928^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (142775621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23542 + ... + 28978.

It is an arithmetic number, because the mean of its divisors is an integer number (6794781).

Almost surely, 2^142775620 is an apocalyptic number.

142775620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142775620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163074744).

142775620 is an abundant number, since it is smaller than the sum of its proper divisors (183373868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142775620 is a wasteful number, since it uses less digits than its factorization.

142775620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560 (or 5558 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 142775620 is about 11948.8752608771. The cubic root of 142775620 is about 522.6585006345.

The spelling of 142775620 in words is "one hundred forty-two million, seven hundred seventy-five thousand, six hundred twenty".