1772281 has 8 divisors (see below), whose sum is σ = 2067200. Its totient is φ = 1518804.

The previous prime is 1772273. The next prime is 1772291. The reversal of 1772281 is 1822771.

It is not a de Polignac number, because 1772281 - 2³ = 1772273 is a prime.

It is a super-2 number, since 2×1772281² = 6281959885922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1772201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2241 + ... + 2926.

It is an arithmetic number, because the mean of its divisors is an integer number (258400).

2^1772281 is an apocalyptic number.

It is an amenable number.

1772281 is a deficient number, since it is larger than the sum of its proper divisors (294919).

1772281 is an frugal number, since it uses more digits than its factorization.

1772281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188 (or 5174 counting only the distinct ones).

The product of its digits is 1568, while the sum is 28.

The square root of 1772281 is about 1331.2704458524. The cubic root of 1772281 is about 121.0163901027.

The spelling of 1772281 in words is "one million, seven hundred seventy-two thousand, two hundred eighty-one".