1021772 has 6 divisors (see below), whose sum is σ = 1788108. Its totient is φ = 510884.

The previous prime is 1021759. The next prime is 1021777. The reversal of 1021772 is 2771201.

It is not an unprimeable number, because it can be changed into a prime (1021777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127718 + ... + 127725.

It is an arithmetic number, because the mean of its divisors is an integer number (298018).

2^1021772 is an apocalyptic number.

It is an amenable number.

1021772 is a deficient number, since it is larger than the sum of its proper divisors (766336).

1021772 is a wasteful number, since it uses less digits than its factorization.

1021772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255447 (or 255445 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 1021772 is about 1010.8273838792. The cubic root of 1021772 is about 100.7205292404.

Adding to 1021772 its reverse (2771201), we get a palindrome (3792973).

The spelling of 1021772 in words is "one million, twenty-one thousand, seven hundred seventy-two".