2557634 has 4 divisors (see below), whose sum is σ = 3836454. Its totient is φ = 1278816.

The previous prime is 2557631. The next prime is 2557649. The reversal of 2557634 is 4367552.

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 + 7225 = 1597^2 + 85^2 .

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁷ + 5⁹ + 7 + 6⁴ + 3⁶ + 4³ .

It is a self number, because there is not a number n which added to its sum of digits gives 2557634.

It is not an unprimeable number, because it can be changed into a prime (2557631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639407 + ... + 639410.

2^2557634 is an apocalyptic number.

2557634 is a deficient number, since it is larger than the sum of its proper divisors (1278820).

2557634 is a wasteful number, since it uses less digits than its factorization.

2557634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278819.

The product of its digits is 25200, while the sum is 32.

The square root of 2557634 is about 1599.2604540849. The cubic root of 2557634 is about 136.7559189619.

The spelling of 2557634 in words is "two million, five hundred fifty-seven thousand, six hundred thirty-four".