2481991 has 4 divisors (see below), whose sum is σ = 2506192. Its totient is φ = 2457792.

The previous prime is 2481979. The next prime is 2482009. The reversal of 2481991 is 1991842.

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 2481991 - 2⁵ = 2481959 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 (2481901) 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, 11946 + ... + 12151.

It is an arithmetic number, because the mean of its divisors is an integer number (626548).

2^2481991 is an apocalyptic number.

2481991 is a deficient number, since it is larger than the sum of its proper divisors (24201).

2481991 is a wasteful number, since it uses less digits than its factorization.

2481991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24200.

The product of its digits is 5184, while the sum is 34.

The square root of 2481991 is about 1575.4335911107. The cubic root of 2481991 is about 135.3942021697.

The spelling of 2481991 in words is "two million, four hundred eighty-one thousand, nine hundred ninety-one".