1986425 has 12 divisors (see below), whose sum is σ = 2815296. Its totient is φ = 1362000.

The previous prime is 1986421. The next prime is 1986437. The reversal of 1986425 is 5246891.

It is not a de Polignac number, because 1986425 - 2² = 1986421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an Ulam number.

It is a d-powerful number, because it can be written as 1 + 9 + 8³ + 6 + 4 + 2¹⁵ + 5⁹ .

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1986421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5501 + ... + 5850.

It is an arithmetic number, because the mean of its divisors is an integer number (234608).

2^1986425 is an apocalyptic number.

It is an amenable number.

1986425 is a deficient number, since it is larger than the sum of its proper divisors (828871).

1986425 is a wasteful number, since it uses less digits than its factorization.

1986425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11368 (or 11363 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 1986425 is about 1409.4059032089. The cubic root of 1986425 is about 125.7064004671.

The spelling of 1986425 in words is "one million, nine hundred eighty-six thousand, four hundred twenty-five".