42468991 has 4 divisors (see below), whose sum is σ = 43050832. Its totient is φ = 41887152.

The previous prime is 42468973. The next prime is 42468997. The reversal of 42468991 is 19986424.

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 42468991 - 2¹⁵ = 42436223 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 (42468997) 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, 290811 + ... + 290956.

It is an arithmetic number, because the mean of its divisors is an integer number (10762708).

Almost surely, 2^42468991 is an apocalyptic number.

42468991 is a deficient number, since it is larger than the sum of its proper divisors (581841).

42468991 is an equidigital number, since it uses as much as digits as its factorization.

42468991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581840.

The product of its digits is 124416, while the sum is 43.

The square root of 42468991 is about 6516.8236894978. The cubic root of 42468991 is about 348.8917078483.

The spelling of 42468991 in words is "forty-two million, four hundred sixty-eight thousand, nine hundred ninety-one".