1772641 has 12 divisors (see below), whose sum is σ = 2035692. Its totient is φ = 1537536.

The previous prime is 1772629. The next prime is 1772647. The reversal of 1772641 is 1462771.

It can be written as a sum of positive squares in 6 ways, for example, as 484416 + 1288225 = 696^2 + 1135^2 .

It is not a de Polignac number, because 1772641 - 2⁵ = 1772609 is a prime.

It is a super-2 number, since 2×1772641² = 6284512229762, which contains 22 as substring.

It is a Duffinian number.

1772641 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1772647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2565 + ... + 3181.

It is an arithmetic number, because the mean of its divisors is an integer number (169641).

2^1772641 is an apocalyptic number.

It is an amenable number.

1772641 is a deficient number, since it is larger than the sum of its proper divisors (263051).

1772641 is a wasteful number, since it uses less digits than its factorization.

1772641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660 (or 647 counting only the distinct ones).

The product of its digits is 2352, while the sum is 28.

The square root of 1772641 is about 1331.4056481779. The cubic root of 1772641 is about 121.0245834894.

The spelling of 1772641 in words is "one million, seven hundred seventy-two thousand, six hundred forty-one".