2539966 has 32 divisors (see below), whose sum is σ = 4572288. Its totient is φ = 1043040.

The previous prime is 2539963. The next prime is 2539981. The reversal of 2539966 is 6699352.

2539966 = 195² + 196² + ... + 246².

Its product of digits (87480) is a multiple of the sum of its prime divisors (216).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23685 + ... + 23791.

It is an arithmetic number, because the mean of its divisors is an integer number (142884).

2^2539966 is an apocalyptic number.

2539966 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2539966 is a deficient number, since it is larger than the sum of its proper divisors (2032322).

2539966 is a wasteful number, since it uses less digits than its factorization.

2539966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216.

The product of its digits is 87480, while the sum is 40.

The square root of 2539966 is about 1593.7270782665. The cubic root of 2539966 is about 136.4402901821.

The spelling of 2539966 in words is "two million, five hundred thirty-nine thousand, nine hundred sixty-six".