1572217 has 2 divisors, whose sum is σ = 1572218. Its totient is φ = 1572216.

The previous prime is 1572203. The next prime is 1572239. The reversal of 1572217 is 7122751.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1527696 + 44521 = 1236^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1572217 - 2¹⁵ = 1539449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1572191 and 1572200.

It is not a weakly prime, because it can be changed into another prime (1572247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786108 + 786109.

It is an arithmetic number, because the mean of its divisors is an integer number (786109).

2^1572217 is an apocalyptic number.

It is an amenable number.

1572217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1572217 is an equidigital number, since it uses as much as digits as its factorization.

1572217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 980, while the sum is 25.

The square root of 1572217 is about 1253.8807758316. The cubic root of 1572217 is about 116.2797696141.

Adding to 1572217 its reverse (7122751), we get a palindrome (8694968).

The spelling of 1572217 in words is "one million, five hundred seventy-two thousand, two hundred seventeen".