2401891 has 2 divisors, whose sum is σ = 2401892. Its totient is φ = 2401890.

The previous prime is 2401871. The next prime is 2401897. The reversal of 2401891 is 1981042.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2401891 - 2¹⁵ = 2369123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2401897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1200945 + 1200946.

It is an arithmetic number, because the mean of its divisors is an integer number (1200946).

2^2401891 is an apocalyptic number.

2401891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2401891 is an equidigital number, since it uses as much as digits as its factorization.

2401891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 2401891 is about 1549.8035359361. The cubic root of 2401891 is about 133.9217446103.

The spelling of 2401891 in words is "two million, four hundred one thousand, eight hundred ninety-one".