2551946 has 4 divisors (see below), whose sum is σ = 3827922. Its totient is φ = 1275972.

The previous prime is 2551943. The next prime is 2551957. The reversal of 2551946 is 6491552.

It is a happy number.

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., 2544025 + 7921 = 1595^2 + 89^2 .

It is not an unprimeable number, because it can be changed into a prime (2551943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637985 + ... + 637988.

2^2551946 is an apocalyptic number.

2551946 is a deficient number, since it is larger than the sum of its proper divisors (1275976).

2551946 is a wasteful number, since it uses less digits than its factorization.

2551946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275975.

The product of its digits is 10800, while the sum is 32.

The square root of 2551946 is about 1597.4811422987. The cubic root of 2551946 is about 136.6544651675.

The spelling of 2551946 in words is "two million, five hundred fifty-one thousand, nine hundred forty-six".