2691601 has 4 divisors (see below), whose sum is σ = 2936304. Its totient is φ = 2446900.

The previous prime is 2691599. The next prime is 2691617. The reversal of 2691601 is 1061962.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2691601 - 2¹ = 2691599 is a prime.

It is a Duffinian number.

2691601 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2691631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122335 + ... + 122356.

It is an arithmetic number, because the mean of its divisors is an integer number (734076).

2^2691601 is an apocalyptic number.

It is an amenable number.

2691601 is a deficient number, since it is larger than the sum of its proper divisors (244703).

2691601 is a wasteful number, since it uses less digits than its factorization.

2691601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244702.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2691601 is about 1640.6099475500. The cubic root of 2691601 is about 139.1031272366.

The spelling of 2691601 in words is "two million, six hundred ninety-one thousand, six hundred one".