42256691 has 8 divisors (see below), whose sum is σ = 43609104. Its totient is φ = 40919680.

The previous prime is 42256667. The next prime is 42256693. The reversal of 42256691 is 19665224.

It is a happy number.

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 42256691 - 2¹⁰ = 42255667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42256693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856 + ... + 9378.

It is an arithmetic number, because the mean of its divisors is an integer number (5451138).

Almost surely, 2^42256691 is an apocalyptic number.

42256691 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

42256691 is a deficient number, since it is larger than the sum of its proper divisors (1352413).

42256691 is a wasteful number, since it uses less digits than its factorization.

42256691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7701.

The product of its digits is 25920, while the sum is 35.

The square root of 42256691 is about 6500.5146719318. The cubic root of 42256691 is about 348.3093733408.

The spelling of 42256691 in words is "forty-two million, two hundred fifty-six thousand, six hundred ninety-one".