2551634 has 4 divisors (see below), whose sum is σ = 3827454. Its totient is φ = 1275816.

The previous prime is 2551607. The next prime is 2551639. The reversal of 2551634 is 4361552.

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

It can be written as a sum of positive squares in only one way, i.e., 2550409 + 1225 = 1597^2 + 35^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2551639) 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 as a sum of consecutive naturals, namely, 637907 + ... + 637910.

2^2551634 is an apocalyptic number.

2551634 is a deficient number, since it is larger than the sum of its proper divisors (1275820).

2551634 is a wasteful number, since it uses less digits than its factorization.

2551634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275819.

The product of its digits is 3600, while the sum is 26.

The square root of 2551634 is about 1597.3834855788. The cubic root of 2551634 is about 136.6488958320.

The spelling of 2551634 in words is "two million, five hundred fifty-one thousand, six hundred thirty-four".