1881607 has 32 divisors (see below), whose sum is σ = 2580480. Its totient is φ = 1330560.

The previous prime is 1881601. The next prime is 1881617. The reversal of 1881607 is 7061881.

It is not a de Polignac number, because 1881607 - 2⁷ = 1881479 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881601) 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 31 ways as a sum of consecutive naturals, for example, 60682 + ... + 60712.

It is an arithmetic number, because the mean of its divisors is an integer number (80640).

2^1881607 is an apocalyptic number.

1881607 is a deficient number, since it is larger than the sum of its proper divisors (698873).

1881607 is a wasteful number, since it uses less digits than its factorization.

1881607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1881607 is about 1371.7168075080. The cubic root of 1881607 is about 123.4552718203.

The spelling of 1881607 in words is "one million, eight hundred eighty-one thousand, six hundred seven".