2506906 has 4 divisors (see below), whose sum is σ = 3760362. Its totient is φ = 1253452.

The previous prime is 2506883. The next prime is 2506909. The reversal of 2506906 is 6096052.

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., 2128681 + 378225 = 1459^2 + 615^2 .

It is not an unprimeable number, because it can be changed into a prime (2506909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626725 + ... + 626728.

2^2506906 is an apocalyptic number.

2506906 is a deficient number, since it is larger than the sum of its proper divisors (1253456).

2506906 is a wasteful number, since it uses less digits than its factorization.

2506906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253455.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 2506906 is about 1583.3211929359. The cubic root of 2506906 is about 135.8457377191.

The spelling of 2506906 in words is "two million, five hundred six thousand, nine hundred six".