42194399 has 6 divisors (see below), whose sum is σ = 45689976. Its totient is φ = 38948520.

The previous prime is 42194363. The next prime is 42194431. The reversal of 42194399 is 99349124.

It is not a de Polignac number, because 42194399 - 2⁸ = 42194143 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 (42194329) 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, 124667 + ... + 125004.

It is an arithmetic number, because the mean of its divisors is an integer number (7614996).

Almost surely, 2^42194399 is an apocalyptic number.

42194399 is a deficient number, since it is larger than the sum of its proper divisors (3495577).

42194399 is a wasteful number, since it uses less digits than its factorization.

42194399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249697 (or 249684 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 42194399 is about 6495.7215919403. The cubic root of 42194399 is about 348.1381376771.

The spelling of 42194399 in words is "forty-two million, one hundred ninety-four thousand, three hundred ninety-nine".