1331955 has 12 divisors (see below), whose sum is σ = 2308800. Its totient is φ = 710352.

The previous prime is 1331951. The next prime is 1331959. The reversal of 1331955 is 5591331.

It is an interprime number because it is at equal distance from previous prime (1331951) and next prime (1331959).

It is not a de Polignac number, because 1331955 - 2² = 1331951 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1331951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14755 + ... + 14844.

It is an arithmetic number, because the mean of its divisors is an integer number (192400).

2^1331955 is an apocalyptic number.

1331955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1331955 is a deficient number, since it is larger than the sum of its proper divisors (976845).

1331955 is a wasteful number, since it uses less digits than its factorization.

1331955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29610 (or 29607 counting only the distinct ones).

The product of its digits is 2025, while the sum is 27.

The square root of 1331955 is about 1154.1035482139. The cubic root of 1331955 is about 110.0263022503.

The spelling of 1331955 in words is "one million, three hundred thirty-one thousand, nine hundred fifty-five".