1986131 has 8 divisors (see below), whose sum is σ = 2284800. Its totient is φ = 1691208.

The previous prime is 1986121. The next prime is 1986133. The reversal of 1986131 is 1316891.

1986131 = T₆₃ + T₆₄ + ... + T₂₂₉.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1986131 - 2⁶ = 1986067 is a prime.

It is a super-2 number, since 2×1986131² = 7889432698322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1986094 and 1986103.

It is not an unprimeable number, because it can be changed into a prime (1986133) 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, 320 + ... + 2018.

It is an arithmetic number, because the mean of its divisors is an integer number (285600).

2^1986131 is an apocalyptic number.

1986131 is a deficient number, since it is larger than the sum of its proper divisors (298669).

1986131 is a wasteful number, since it uses less digits than its factorization.

1986131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873.

The product of its digits is 1296, while the sum is 29.

The square root of 1986131 is about 1409.3016000842. The cubic root of 1986131 is about 125.7001984534.

The spelling of 1986131 in words is "one million, nine hundred eighty-six thousand, one hundred thirty-one".