1522397 has 4 divisors (see below), whose sum is σ = 1528956. Its totient is φ = 1515840.

The previous prime is 1522387. The next prime is 1522399. The reversal of 1522397 is 7932251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7932251 = 17 ⋅466603.

It can be written as a sum of positive squares in 2 ways, for example, as 988036 + 534361 = 994^2 + 731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1522397 is a prime.

It is a d-powerful number, because it can be written as 1 + 5⁸ + 2¹⁶ + 2¹⁶ + 3¹¹ + 9 + 7⁷ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1522399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2918 + ... + 3399.

It is an arithmetic number, because the mean of its divisors is an integer number (382239).

2^1522397 is an apocalyptic number.

It is an amenable number.

1522397 is a deficient number, since it is larger than the sum of its proper divisors (6559).

1522397 is an equidigital number, since it uses as much as digits as its factorization.

1522397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6558.

The product of its digits is 3780, while the sum is 29.

The square root of 1522397 is about 1233.8545295131. The cubic root of 1522397 is about 115.0383488991.

The spelling of 1522397 in words is "one million, five hundred twenty-two thousand, three hundred ninety-seven".