2601551 has 4 divisors (see below), whose sum is σ = 2685504. Its totient is φ = 2517600.

The previous prime is 2601539. The next prime is 2601563. The reversal of 2601551 is 1551062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1551062 = 2 ⋅775531.

It is an interprime number because it is at equal distance from previous prime (2601539) and next prime (2601563).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2601551 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 (2601451) 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, 41930 + ... + 41991.

It is an arithmetic number, because the mean of its divisors is an integer number (671376).

2^2601551 is an apocalyptic number.

2601551 is a deficient number, since it is larger than the sum of its proper divisors (83953).

2601551 is an equidigital number, since it uses as much as digits as its factorization.

2601551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83952.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2601551 is about 1612.9324226390. The cubic root of 2601551 is about 137.5342239878.

The spelling of 2601551 in words is "two million, six hundred one thousand, five hundred fifty-one".