2561007 has 4 divisors (see below), whose sum is σ = 3414680. Its totient is φ = 1707336.

The previous prime is 2560997. The next prime is 2561017. The reversal of 2561007 is 7001652.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2560997) and next prime (2561017).

It is not a de Polignac number, because 2561007 - 2¹⁰ = 2559983 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426832 + ... + 426837.

It is an arithmetic number, because the mean of its divisors is an integer number (853670).

2^2561007 is an apocalyptic number.

2561007 is a deficient number, since it is larger than the sum of its proper divisors (853673).

2561007 is an equidigital number, since it uses as much as digits as its factorization.

2561007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853672.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 2561007 is about 1600.3146565598. The cubic root of 2561007 is about 136.8160103180.

Adding to 2561007 its reverse (7001652), we get a palindrome (9562659).

The spelling of 2561007 in words is "two million, five hundred sixty-one thousand, seven".