142166025 has 36 divisors (see below), whose sum is σ = 261532492. Its totient is φ = 73768320.

The previous prime is 142165997. The next prime is 142166029. The reversal of 142166025 is 520661241.

142166025 is a `hidden beast` number, since 1 + 42 + 16 + 602 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 389376 + 141776649 = 624^2 + 11907^2 .

It is not a de Polignac number, because 142166025 - 2¹⁴ = 142149641 is a prime.

It is a super-2 number, since 2×142166025² = 40422357328601250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 142166025.

It is not an unprimeable number, because it can be changed into a prime (142166029) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 214 + ... + 16863.

Almost surely, 2^142166025 is an apocalyptic number.

142166025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142166025 is a deficient number, since it is larger than the sum of its proper divisors (119366467).

142166025 is a wasteful number, since it uses less digits than its factorization.

142166025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17130 (or 17122 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 142166025 is about 11923.3395070341. The cubic root of 142166025 is about 521.9135916338.

The spelling of 142166025 in words is "one hundred forty-two million, one hundred sixty-six thousand, twenty-five".