142155391225 has 9 divisors (see below), whose sum is σ = 176275022767. Its totient is φ = 113722804840.

The previous prime is 142155391201. The next prime is 142155391267. The reversal of 142155391225 is 522193551241.

The square root of 142155391225 is 377035.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 51175940841 + 90979450384 = 226221^2 + 301628^2 .

It is not a de Polignac number, because 142155391225 - 2⁵ = 142155391193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1847472 + ... + 1922878.

Almost surely, 2^142155391225 is an apocalyptic number.

142155391225 is the 377035-th square number.

142155391225 is the 188518-th centered octagonal number.

It is an amenable number.

142155391225 is a deficient number, since it is larger than the sum of its proper divisors (34119631542).

142155391225 is an frugal number, since it uses more digits than its factorization.

142155391225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150824 (or 75412 counting only the distinct ones).

The product of its digits is 108000, while the sum is 40.

The spelling of 142155391225 in words is "one hundred forty-two billion, one hundred fifty-five million, three hundred ninety-one thousand, two hundred twenty-five".