1321410402 has 128 divisors (see below), whose sum is σ = 3346237440. Its totient is φ = 383616000.

The previous prime is 1321410401. The next prime is 1321410403. The reversal of 1321410402 is 2040141231.

It is an interprime number because it is at equal distance from previous prime (1321410401) and next prime (1321410403).

It is a super-2 number, since 2×1321410402² = 3492250901027603208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1321410401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 891502 + ... + 892982.

It is an arithmetic number, because the mean of its divisors is an integer number (26142480).

Almost surely, 2^1321410402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321410402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673118720).

1321410402 is an abundant number, since it is smaller than the sum of its proper divisors (2024827038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321410402 is a wasteful number, since it uses less digits than its factorization.

1321410402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577 (or 1571 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1321410402 is about 36351.2090858062. The cubic root of 1321410402 is about 1097.3518674852.

Adding to 1321410402 its reverse (2040141231), we get a palindrome (3361551633).

The spelling of 1321410402 in words is "one billion, three hundred twenty-one million, four hundred ten thousand, four hundred two".