42709851 has 6 divisors (see below), whose sum is σ = 61692020. Its totient is φ = 28473228.

The previous prime is 42709829. The next prime is 42709859. The reversal of 42709851 is 15890724.

It is not a de Polignac number, because 42709851 - 2¹⁴ = 42693467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42709859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2372761 + ... + 2372778.

Almost surely, 2^42709851 is an apocalyptic number.

42709851 is a deficient number, since it is larger than the sum of its proper divisors (18982169).

42709851 is a wasteful number, since it uses less digits than its factorization.

42709851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745545 (or 4745542 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 42709851 is about 6535.2774233387. The cubic root of 42709851 is about 349.5500367369.

The spelling of 42709851 in words is "forty-two million, seven hundred nine thousand, eight hundred fifty-one".