42254391 has 8 divisors (see below), whose sum is σ = 56377840. Its totient is φ = 28150272.

The previous prime is 42254389. The next prime is 42254417. The reversal of 42254391 is 19345224.

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

It is not a de Polignac number, because 42254391 - 2¹ = 42254389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42254321) 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, 1431 + ... + 9303.

It is an arithmetic number, because the mean of its divisors is an integer number (7047230).

Almost surely, 2^42254391 is an apocalyptic number.

42254391 is a deficient number, since it is larger than the sum of its proper divisors (14123449).

42254391 is a wasteful number, since it uses less digits than its factorization.

42254391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9665.

The product of its digits is 8640, while the sum is 30.

The square root of 42254391 is about 6500.3377604552. The cubic root of 42254391 is about 348.3030538202.

The spelling of 42254391 in words is "forty-two million, two hundred fifty-four thousand, three hundred ninety-one".