42140025 has 72 divisors (see below), whose sum is σ = 83566080. Its totient is φ = 20190720.

The previous prime is 42140017. The next prime is 42140029. The reversal of 42140025 is 52004124.

It is not a de Polignac number, because 42140025 - 2³ = 42140017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42140029) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 87736 + ... + 88214.

It is an arithmetic number, because the mean of its divisors is an integer number (1160640).

Almost surely, 2^42140025 is an apocalyptic number.

42140025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42140025 is a deficient number, since it is larger than the sum of its proper divisors (41426055).

42140025 is a wasteful number, since it uses less digits than its factorization.

42140025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 42140025 is about 6491.5348724319. The cubic root of 42140025 is about 347.9885301412.

Adding to 42140025 its reverse (52004124), we get a palindrome (94144149).

The spelling of 42140025 in words is "forty-two million, one hundred forty thousand, twenty-five".