142640125 has 48 divisors (see below), whose sum is σ = 196138800. Its totient is φ = 103420800.

The previous prime is 142640123. The next prime is 142640161. The reversal of 142640125 is 521046241.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 31843449 + 110796676 = 5643^2 + 10526^2 .

It is not a de Polignac number, because 142640125 - 2¹ = 142640123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 142640125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142640123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1308571 + ... + 1308679.

It is an arithmetic number, because the mean of its divisors is an integer number (4086225).

Almost surely, 2^142640125 is an apocalyptic number.

It is an amenable number.

142640125 is a deficient number, since it is larger than the sum of its proper divisors (53498675).

142640125 is a wasteful number, since it uses less digits than its factorization.

142640125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 142640125 is about 11943.2041345696. The cubic root of 142640125 is about 522.4931128569.

Adding to 142640125 its reverse (521046241), we get a palindrome (663686366).

The spelling of 142640125 in words is "one hundred forty-two million, six hundred forty thousand, one hundred twenty-five".