2451997 has 4 divisors (see below), whose sum is σ = 2485660. Its totient is φ = 2418336.

The previous prime is 2451991. The next prime is 2452003. The reversal of 2451997 is 7991542.

2451997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (2451991) and next prime (2452003).

It can be written as a sum of positive squares in 2 ways, for example, as 2056356 + 395641 = 1434^2 + 629^2 .

It is a cyclic number.

It is not a de Polignac number, because 2451997 - 2¹⁵ = 2419229 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 (2451991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16722 + ... + 16867.

It is an arithmetic number, because the mean of its divisors is an integer number (621415).

2^2451997 is an apocalyptic number.

It is an amenable number.

2451997 is a deficient number, since it is larger than the sum of its proper divisors (33663).

2451997 is an equidigital number, since it uses as much as digits as its factorization.

2451997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33662.

The product of its digits is 22680, while the sum is 37.

The square root of 2451997 is about 1565.8853725608. The cubic root of 2451997 is about 134.8465930034.

The spelling of 2451997 in words is "two million, four hundred fifty-one thousand, nine hundred ninety-seven".