1302400221 has 8 divisors (see below), whose sum is σ = 1773481344. Its totient is φ = 849792960.

The previous prime is 1302400213. The next prime is 1302400261. The reversal of 1302400221 is 1220042031.

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

It is not a de Polignac number, because 1302400221 - 2³ = 1302400213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1302400221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302400261) 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, 4618300 + ... + 4618581.

It is an arithmetic number, because the mean of its divisors is an integer number (221685168).

Almost surely, 2^1302400221 is an apocalyptic number.

It is an amenable number.

1302400221 is a deficient number, since it is larger than the sum of its proper divisors (471081123).

1302400221 is an equidigital number, since it uses as much as digits as its factorization.

1302400221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9236931.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1302400221 is about 36088.7824815413. The cubic root of 1302400221 is about 1092.0641583351.

Adding to 1302400221 its reverse (1220042031), we get a palindrome (2522442252).

The spelling of 1302400221 in words is "one billion, three hundred two million, four hundred thousand, two hundred twenty-one".