1251982 has 16 divisors (see below), whose sum is σ = 2076192. Its totient is φ = 563200.

The previous prime is 1251961. The next prime is 1251983. The reversal of 1251982 is 2891521.

It is a self number, because there is not a number n which added to its sum of digits gives 1251982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19 + ... + 1582.

It is an arithmetic number, because the mean of its divisors is an integer number (129762).

2^1251982 is an apocalyptic number.

1251982 is a deficient number, since it is larger than the sum of its proper divisors (824210).

1251982 is a wasteful number, since it uses less digits than its factorization.

1251982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643.

The product of its digits is 1440, while the sum is 28.

The square root of 1251982 is about 1118.9200150145. The cubic root of 1251982 is about 107.7786389637.

The spelling of 1251982 in words is "one million, two hundred fifty-one thousand, nine hundred eighty-two".