402013321 has 16 divisors (see below), whose sum is σ = 421122240. Its totient is φ = 383423040.

The previous prime is 402013319. The next prime is 402013349. The reversal of 402013321 is 123310204.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 402013321 - 2¹ = 402013319 is a prime.

It is a super-2 number, since 2×402013321² = 323229420522898082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402013295 and 402013304.

It is not an unprimeable number, because it can be changed into a prime (402013361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 954691 + ... + 955111.

It is an arithmetic number, because the mean of its divisors is an integer number (26320140).

Almost surely, 2^402013321 is an apocalyptic number.

It is an amenable number.

402013321 is a deficient number, since it is larger than the sum of its proper divisors (19108919).

402013321 is a wasteful number, since it uses less digits than its factorization.

402013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 402013321 is about 20050.2698485581. The cubic root of 402013321 is about 738.0404211329.

Adding to 402013321 its reverse (123310204), we get a palindrome (525323525).

The spelling of 402013321 in words is "four hundred two million, thirteen thousand, three hundred twenty-one".