1612881 has 6 divisors (see below), whose sum is σ = 2329730. Its totient is φ = 1075248.

The previous prime is 1612859. The next prime is 1612903. The reversal of 1612881 is 1882161.

It is an interprime number because it is at equal distance from previous prime (1612859) and next prime (1612903).

It can be written as a sum of positive squares in only one way, i.e., 1587600 + 25281 = 1260^2 + 159^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1612881 is a prime.

It is a super-2 number, since 2×1612881² = 5202770240322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1612181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89596 + ... + 89613.

2^1612881 is an apocalyptic number.

It is an amenable number.

1612881 is a deficient number, since it is larger than the sum of its proper divisors (716849).

1612881 is a wasteful number, since it uses less digits than its factorization.

1612881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179215 (or 179212 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 1612881 is about 1269.9925196630. The cubic root of 1612881 is about 117.2737399326.

The spelling of 1612881 in words is "one million, six hundred twelve thousand, eight hundred eighty-one".