1020001597 has 4 divisors (see below), whose sum is σ = 1020309696. Its totient is φ = 1019693500.

The previous prime is 1020001553. The next prime is 1020001621. The reversal of 1020001597 is 7951000201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020001597 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 (1020001517) 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, 149029 + ... + 155722.

It is an arithmetic number, because the mean of its divisors is an integer number (255077424).

Almost surely, 2^1020001597 is an apocalyptic number.

It is an amenable number.

1020001597 is a deficient number, since it is larger than the sum of its proper divisors (308099).

1020001597 is an equidigital number, since it uses as much as digits as its factorization.

1020001597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308098.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 1020001597 is about 31937.4638473377. The cubic root of 1020001597 is about 1006.6232349116.

Adding to 1020001597 its reverse (7951000201), we get a palindrome (8971001798).

The spelling of 1020001597 in words is "one billion, twenty million, one thousand, five hundred ninety-seven".