1022526397 has 4 divisors (see below), whose sum is σ = 1022607036. Its totient is φ = 1022445760.

The previous prime is 1022526391. The next prime is 1022526409. The reversal of 1022526397 is 7936252201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 868245156 + 154281241 = 29466^2 + 12421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022526397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022526391) 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, 16678 + ... + 48199.

It is an arithmetic number, because the mean of its divisors is an integer number (255651759).

Almost surely, 2^1022526397 is an apocalyptic number.

It is an amenable number.

1022526397 is a deficient number, since it is larger than the sum of its proper divisors (80639).

1022526397 is an equidigital number, since it uses as much as digits as its factorization.

1022526397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80638.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 1022526397 is about 31976.9666635220. The cubic root of 1022526397 is about 1007.4531121158.

Adding to 1022526397 its reverse (7936252201), we get a palindrome (8958778598).

The spelling of 1022526397 in words is "one billion, twenty-two million, five hundred twenty-six thousand, three hundred ninety-seven".