42411991 has 4 divisors (see below), whose sum is σ = 44906832. Its totient is φ = 39917152.

The previous prime is 42411983. The next prime is 42411997. The reversal of 42411991 is 19911424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42411991 - 2³ = 42411983 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 (42411997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247395 + ... + 1247428.

It is an arithmetic number, because the mean of its divisors is an integer number (11226708).

Almost surely, 2^42411991 is an apocalyptic number.

42411991 is a deficient number, since it is larger than the sum of its proper divisors (2494841).

42411991 is a wasteful number, since it uses less digits than its factorization.

42411991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494840.

The product of its digits is 2592, while the sum is 31.

The square root of 42411991 is about 6512.4489249437. The cubic root of 42411991 is about 348.7355489616.

The spelling of 42411991 in words is "forty-two million, four hundred eleven thousand, nine hundred ninety-one".