42396409 has 8 divisors (see below), whose sum is σ = 47326752. Its totient is φ = 37645440.

The previous prime is 42396407. The next prime is 42396427. The reversal of 42396409 is 90469324.

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 42396409 - 2¹ = 42396407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42396401) 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, 44344 + ... + 45289.

It is an arithmetic number, because the mean of its divisors is an integer number (5915844).

Almost surely, 2^42396409 is an apocalyptic number.

It is an amenable number.

42396409 is a deficient number, since it is larger than the sum of its proper divisors (4930343).

42396409 is a wasteful number, since it uses less digits than its factorization.

42396409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89687.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 42396409 is about 6511.2524908807. The cubic root of 42396409 is about 348.6928357037.

It can be divided in two parts, 4239 and 6409, that added together give a cube (10648 = 22³).

The spelling of 42396409 in words is "forty-two million, three hundred ninety-six thousand, four hundred nine".