1065256397 has 8 divisors (see below), whose sum is σ = 1140593400. Its totient is φ = 991327744.

The previous prime is 1065256351. The next prime is 1065256411. The reversal of 1065256397 is 7936525601.

It can be written as a sum of positive squares in 4 ways, for example, as 3865156 + 1061391241 = 1966^2 + 32579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1065256397 - 2¹⁸ = 1064994253 is a prime.

It is a super-2 number, since 2×1065256397² = 2269542382698843218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065256327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350522 + ... + 353547.

It is an arithmetic number, because the mean of its divisors is an integer number (142574175).

Almost surely, 2^1065256397 is an apocalyptic number.

1065256397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1065256397 is a deficient number, since it is larger than the sum of its proper divisors (75337003).

1065256397 is an equidigital number, since it uses as much as digits as its factorization.

1065256397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704175.

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 1065256397 is about 32638.2658393488. The cubic root of 1065256397 is about 1021.2954183690.

The spelling of 1065256397 in words is "one billion, sixty-five million, two hundred fifty-six thousand, three hundred ninety-seven".