1951986 has 16 divisors (see below), whose sum is σ = 3921984. Its totient is φ = 647664.

The previous prime is 1951967. The next prime is 1951993. The reversal of 1951986 is 6891591.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960 + ... + 2196.

It is an arithmetic number, because the mean of its divisors is an integer number (245124).

2^1951986 is an apocalyptic number.

1951986 is an abundant number, since it is smaller than the sum of its proper divisors (1969998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1951986 is a wasteful number, since it uses less digits than its factorization.

1951986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505.

The product of its digits is 19440, while the sum is 39.

The square root of 1951986 is about 1397.1349254814. The cubic root of 1951986 is about 124.9756966084.

The spelling of 1951986 in words is "one million, nine hundred fifty-one thousand, nine hundred eighty-six".