1772561 has 8 divisors (see below), whose sum is σ = 2042304. Its totient is φ = 1506960.

The previous prime is 1772557. The next prime is 1772569. The reversal of 1772561 is 1652771.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1772561 - 2² = 1772557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1772569) 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, 50 + ... + 1883.

It is an arithmetic number, because the mean of its divisors is an integer number (255288).

2^1772561 is an apocalyptic number.

It is an amenable number.

1772561 is a deficient number, since it is larger than the sum of its proper divisors (269743).

1772561 is a wasteful number, since it uses less digits than its factorization.

1772561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071.

The product of its digits is 2940, while the sum is 29.

The square root of 1772561 is about 1331.3756044032. The cubic root of 1772561 is about 121.0227628327.

The spelling of 1772561 in words is "one million, seven hundred seventy-two thousand, five hundred sixty-one".