42743925 has 54 divisors (see below), whose sum is σ = 89081538. Its totient is φ = 19535040.

The previous prime is 42743893. The next prime is 42743929. The reversal of 42743925 is 52934724.

It can be written as a sum of positive squares in 3 ways, for example, as 636804 + 42107121 = 798^2 + 6489^2 .

It is not a de Polignac number, because 42743925 - 2⁵ = 42743893 is a prime.

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 42743925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42743929) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 9087 + ... + 12963.

Almost surely, 2^42743925 is an apocalyptic number.

42743925 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42743925 is an abundant number, since it is smaller than the sum of its proper divisors (46337613).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42743925 is a wasteful number, since it uses less digits than its factorization.

42743925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907 (or 3892 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 42743925 is about 6537.8838319444. The cubic root of 42743925 is about 349.6429692544.

The spelling of 42743925 in words is "forty-two million, seven hundred forty-three thousand, nine hundred twenty-five".