1985955 has 16 divisors (see below), whose sum is σ = 3252480. Its totient is φ = 1034208.

The previous prime is 1985939. The next prime is 1985987. The reversal of 1985955 is 5595891.

It is a happy number.

It is not a de Polignac number, because 1985955 - 2⁴ = 1985939 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 895 + ... + 2184.

It is an arithmetic number, because the mean of its divisors is an integer number (203280).

2^1985955 is an apocalyptic number.

1985955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1985955 is a deficient number, since it is larger than the sum of its proper divisors (1266525).

1985955 is a wasteful number, since it uses less digits than its factorization.

1985955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130.

The product of its digits is 81000, while the sum is 42.

The square root of 1985955 is about 1409.2391564245. The cubic root of 1985955 is about 125.6964853905.

The spelling of 1985955 in words is "one million, nine hundred eighty-five thousand, nine hundred fifty-five".