2511986 has 4 divisors (see below), whose sum is σ = 3767982. Its totient is φ = 1255992.

The previous prime is 2511983. The next prime is 2511997. The reversal of 2511986 is 6891152.

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., 2157961 + 354025 = 1469^2 + 595^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2511983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627995 + ... + 627998.

2^2511986 is an apocalyptic number.

2511986 is a deficient number, since it is larger than the sum of its proper divisors (1255996).

2511986 is a wasteful number, since it uses less digits than its factorization.

2511986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255995.

The product of its digits is 4320, while the sum is 32.

The square root of 2511986 is about 1584.9246038850. The cubic root of 2511986 is about 135.9374351785.

The spelling of 2511986 in words is "two million, five hundred eleven thousand, nine hundred eighty-six".