2781401 has 8 divisors (see below), whose sum is σ = 3264960. Its totient is φ = 2319408.

The previous prime is 2781397. The next prime is 2781433. The reversal of 2781401 is 1041872.

2781401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2781401 - 2² = 2781397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2781451) 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 7 ways as a sum of consecutive naturals, for example, 5111 + ... + 5628.

It is an arithmetic number, because the mean of its divisors is an integer number (408120).

2^2781401 is an apocalyptic number.

It is an amenable number.

2781401 is a deficient number, since it is larger than the sum of its proper divisors (483559).

2781401 is a wasteful number, since it uses less digits than its factorization.

2781401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10783.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 2781401 is about 1667.7532791153. The cubic root of 2781401 is about 140.6332032087.

The spelling of 2781401 in words is "two million, seven hundred eighty-one thousand, four hundred one".