42909751 has 8 divisors (see below), whose sum is σ = 46662480. Its totient is φ = 39293568.

The previous prime is 42909707. The next prime is 42909767. The reversal of 42909751 is 15790924.

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

It is a cyclic number.

It is not a de Polignac number, because 42909751 - 2⁷ = 42909623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42909751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42909781) 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, 33481 + ... + 34738.

It is an arithmetic number, because the mean of its divisors is an integer number (5832810).

Almost surely, 2^42909751 is an apocalyptic number.

42909751 is a deficient number, since it is larger than the sum of its proper divisors (3752729).

42909751 is a wasteful number, since it uses less digits than its factorization.

42909751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68273.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 42909751 is about 6550.5534880650. The cubic root of 42909751 is about 350.0945350080.

It can be divided in two parts, 42909 and 751, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 42909751 in words is "forty-two million, nine hundred nine thousand, seven hundred fifty-one".