1881495 has 64 divisors (see below), whose sum is σ = 4193280. Its totient is φ = 777600.

The previous prime is 1881493. The next prime is 1881499. The reversal of 1881495 is 5941881.

It is not a de Polignac number, because 1881495 - 2¹ = 1881493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10305 + ... + 10485.

It is an arithmetic number, because the mean of its divisors is an integer number (65520).

2^1881495 is an apocalyptic number.

1881495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1881495 is an abundant number, since it is smaller than the sum of its proper divisors (2311785).

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

1881495 is a wasteful number, since it uses less digits than its factorization.

1881495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 207 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 1881495 is about 1371.6759821474. The cubic root of 1881495 is about 123.4528222714.

The spelling of 1881495 in words is "one million, eight hundred eighty-one thousand, four hundred ninety-five".