142211525 has 6 divisors (see below), whose sum is σ = 176342322. Its totient is φ = 113769200.

The previous prime is 142211521. The next prime is 142211527. The reversal of 142211525 is 525112241.

It can be written as a sum of positive squares in 3 ways, for example, as 1623076 + 140588449 = 1274^2 + 11857^2 .

It is not a de Polignac number, because 142211525 - 2² = 142211521 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 142211525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142211521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2844206 + ... + 2844255.

It is an arithmetic number, because the mean of its divisors is an integer number (29390387).

Almost surely, 2^142211525 is an apocalyptic number.

It is an amenable number.

142211525 is a deficient number, since it is larger than the sum of its proper divisors (34130797).

142211525 is an equidigital number, since it uses as much as digits as its factorization.

142211525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5688471 (or 5688466 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 142211525 is about 11925.2473768891. The cubic root of 142211525 is about 521.9692648874.

Adding to 142211525 its reverse (525112241), we get a palindrome (667323766).

The spelling of 142211525 in words is "one hundred forty-two million, two hundred eleven thousand, five hundred twenty-five".