42799725 has 48 divisors (see below), whose sum is σ = 79310400. Its totient is φ = 22628160.

The previous prime is 42799699. The next prime is 42799733. The reversal of 42799725 is 52799724.

It is not a de Polignac number, because 42799725 - 2⁶ = 42799661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (317520) is a multiple of the sum of its prime divisors (560).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109831 + ... + 110219.

It is an arithmetic number, because the mean of its divisors is an integer number (1652300).

Almost surely, 2^42799725 is an apocalyptic number.

42799725 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42799725 is a deficient number, since it is larger than the sum of its proper divisors (36510675).

42799725 is a wasteful number, since it uses less digits than its factorization.

42799725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571 (or 560 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 42799725 is about 6542.1498759964. The cubic root of 42799725 is about 349.7950500787.

Subtracting 42799725 from its reverse (52799724), we obtain a palindrome (9999999).

The spelling of 42799725 in words is "forty-two million, seven hundred ninety-nine thousand, seven hundred twenty-five".