1772421 has 8 divisors (see below), whose sum is σ = 2700864. Its totient is φ = 1012800.

The previous prime is 1772401. The next prime is 1772423. The reversal of 1772421 is 1242771.

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

It is not a de Polignac number, because 1772421 - 2⁷ = 1772293 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1772391 and 1772400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1772423) 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, 42180 + ... + 42221.

It is an arithmetic number, because the mean of its divisors is an integer number (337608).

2^1772421 is an apocalyptic number.

It is an amenable number.

1772421 is a deficient number, since it is larger than the sum of its proper divisors (928443).

1772421 is an equidigital number, since it uses as much as digits as its factorization.

1772421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84411.

The product of its digits is 784, while the sum is 24.

The square root of 1772421 is about 1331.3230261661. The cubic root of 1772421 is about 121.0195765516.

The spelling of 1772421 in words is "one million, seven hundred seventy-two thousand, four hundred twenty-one".