1321410561 has 8 divisors (see below), whose sum is σ = 1865520864. Its totient is φ = 829120320.

The previous prime is 1321410553. The next prime is 1321410569. The reversal of 1321410561 is 1650141231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1321410553) and next prime (1321410569).

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

It is not a de Polignac number, because 1321410561 - 2³ = 1321410553 is a prime.

It is a super-2 number, since 2×1321410561² = 3492251741444669442, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321410569) 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, 12954955 + ... + 12955056.

It is an arithmetic number, because the mean of its divisors is an integer number (233190108).

Almost surely, 2^1321410561 is an apocalyptic number.

It is an amenable number.

1321410561 is a deficient number, since it is larger than the sum of its proper divisors (544110303).

1321410561 is a wasteful number, since it uses less digits than its factorization.

1321410561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25910031.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1321410561 is about 36351.2112728036. The cubic root of 1321410561 is about 1097.3519114985.

Adding to 1321410561 its reverse (1650141231), we get a palindrome (2971551792).

The spelling of 1321410561 in words is "one billion, three hundred twenty-one million, four hundred ten thousand, five hundred sixty-one".