2651641 has 4 divisors (see below), whose sum is σ = 2659984. Its totient is φ = 2643300.

The previous prime is 2651639. The next prime is 2651651. The reversal of 2651641 is 1461562.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1461562 = 2 ⋅730781.

It is a cyclic number.

It is not a de Polignac number, because 2651641 - 2¹ = 2651639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2651611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3675 + ... + 4336.

It is an arithmetic number, because the mean of its divisors is an integer number (664996).

2^2651641 is an apocalyptic number.

It is an amenable number.

2651641 is a deficient number, since it is larger than the sum of its proper divisors (8343).

2651641 is an equidigital number, since it uses as much as digits as its factorization.

2651641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8342.

The product of its digits is 1440, while the sum is 25.

The square root of 2651641 is about 1628.3860107481. The cubic root of 2651641 is about 138.4113087588.

The spelling of 2651641 in words is "two million, six hundred fifty-one thousand, six hundred forty-one".