2001572 has 6 divisors (see below), whose sum is σ = 3502758. Its totient is φ = 1000784.

The previous prime is 2001553. The next prime is 2001581. The reversal of 2001572 is 2751002.

It can be written as a sum of positive squares in only one way, i.e., 1705636 + 295936 = 1306^2 + 544^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2001572.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250193 + ... + 250200.

It is an arithmetic number, because the mean of its divisors is an integer number (583793).

2^2001572 is an apocalyptic number.

It is an amenable number.

2001572 is a deficient number, since it is larger than the sum of its proper divisors (1501186).

2001572 is a wasteful number, since it uses less digits than its factorization.

2001572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500397 (or 500395 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 2001572 is about 1414.7692391341. The cubic root of 2001572 is about 126.0251062762.

Adding to 2001572 its reverse (2751002), we get a palindrome (4752574).

The spelling of 2001572 in words is "two million, one thousand, five hundred seventy-two".