1301220997 has 4 divisors (see below), whose sum is σ = 1301851980. Its totient is φ = 1300590016.

The previous prime is 1301220971. The next prime is 1301221007. The reversal of 1301220997 is 7990221031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 896044356 + 405176641 = 29934^2 + 20129^2 .

It is a cyclic number.

It is not a de Polignac number, because 1301220997 - 2¹¹ = 1301218949 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 (1301221997) 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, 312388 + ... + 316525.

It is an arithmetic number, because the mean of its divisors is an integer number (325462995).

Almost surely, 2^1301220997 is an apocalyptic number.

It is an amenable number.

1301220997 is a deficient number, since it is larger than the sum of its proper divisors (630983).

1301220997 is an equidigital number, since it uses as much as digits as its factorization.

1301220997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630982.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 1301220997 is about 36072.4409625964. The cubic root of 1301220997 is about 1091.7344652283.

Adding to 1301220997 its sum of digits (34), we get a palindrome (1301221031).

The spelling of 1301220997 in words is "one billion, three hundred one million, two hundred twenty thousand, nine hundred ninety-seven".