2558722 has 4 divisors (see below), whose sum is σ = 3838086. Its totient is φ = 1279360.

The previous prime is 2558719. The next prime is 2558729. The reversal of 2558722 is 2278552.

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., 2374681 + 184041 = 1541^2 + 429^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2558729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639679 + ... + 639682.

2^2558722 is an apocalyptic number.

2558722 is a deficient number, since it is larger than the sum of its proper divisors (1279364).

2558722 is a wasteful number, since it uses less digits than its factorization.

2558722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279363.

The product of its digits is 11200, while the sum is 31.

The square root of 2558722 is about 1599.6005751437. The cubic root of 2558722 is about 136.7753078902.

The spelling of 2558722 in words is "two million, five hundred fifty-eight thousand, seven hundred twenty-two".