1351986 has 32 divisors (see below), whose sum is σ = 2878848. Its totient is φ = 422400.

The previous prime is 1351981. The next prime is 1351991. The reversal of 1351986 is 6891531.

It is an interprime number because it is at equal distance from previous prime (1351981) and next prime (1351991).

It is a super-2 number, since 2×1351986² = 3655732288392, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351981) 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, 13336 + ... + 13436.

It is an arithmetic number, because the mean of its divisors is an integer number (89964).

2^1351986 is an apocalyptic number.

1351986 is an abundant number, since it is smaller than the sum of its proper divisors (1526862).

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

1351986 is a wasteful number, since it uses less digits than its factorization.

1351986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226.

The product of its digits is 6480, while the sum is 33.

The square root of 1351986 is about 1162.7493281013. The cubic root of 1351986 is about 110.5751146014.

The spelling of 1351986 in words is "one million, three hundred fifty-one thousand, nine hundred eighty-six".