42897749 has 8 divisors (see below), whose sum is σ = 45864000. Its totient is φ = 39980736.

The previous prime is 42897731. The next prime is 42897761. The reversal of 42897749 is 94779824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42897749 - 2⁸ = 42897493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42897697 and 42897706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42867749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10499 + ... + 14000.

It is an arithmetic number, because the mean of its divisors is an integer number (5733000).

Almost surely, 2^42897749 is an apocalyptic number.

It is an amenable number.

42897749 is a deficient number, since it is larger than the sum of its proper divisors (2966251).

42897749 is a wasteful number, since it uses less digits than its factorization.

42897749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24619.

The product of its digits is 1016064, while the sum is 50.

The square root of 42897749 is about 6549.6373182032. The cubic root of 42897749 is about 350.0618910959.

The spelling of 42897749 in words is "forty-two million, eight hundred ninety-seven thousand, seven hundred forty-nine".