1021572 has 36 divisors (see below), whose sum is σ = 2680496. Its totient is φ = 340200.

The previous prime is 1021571. The next prime is 1021577. The reversal of 1021572 is 2751201.

1021572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1021571) 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, 447 + ... + 1497.

2^1021572 is an apocalyptic number.

1021572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1340248).

1021572 is an abundant number, since it is smaller than the sum of its proper divisors (1658924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021572 is a wasteful number, since it uses less digits than its factorization.

1021572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 1021572 is about 1010.7284501784. The cubic root of 1021572 is about 100.7139571871.

Adding to 1021572 its reverse (2751201), we get a palindrome (3772773).

The spelling of 1021572 in words is "one million, twenty-one thousand, five hundred seventy-two".