2494781 has 2 divisors, whose sum is σ = 2494782. Its totient is φ = 2494780.

The previous prime is 2494777. The next prime is 2494819. The reversal of 2494781 is 1874942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1666681 + 828100 = 1291^2 + 910^2 .

It is a cyclic number.

It is not a de Polignac number, because 2494781 - 2² = 2494777 is a prime.

It is a super-2 number, since 2×2494781² = 12447864475922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2494711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1247390 + 1247391.

It is an arithmetic number, because the mean of its divisors is an integer number (1247391).

2^2494781 is an apocalyptic number.

It is an amenable number.

2494781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2494781 is an equidigital number, since it uses as much as digits as its factorization.

2494781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 2494781 is about 1579.4875751332. The cubic root of 2494781 is about 135.6263713963.

The spelling of 2494781 in words is "two million, four hundred ninety-four thousand, seven hundred eighty-one".