1321628151 has 8 divisors (see below), whose sum is σ = 1786990464. Its totient is φ = 868675640.

The previous prime is 1321628149. The next prime is 1321628159. The reversal of 1321628151 is 1518261231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321628151 - 2¹ = 1321628149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321628159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3102201 + ... + 3102626.

It is an arithmetic number, because the mean of its divisors is an integer number (223373808).

Almost surely, 2^1321628151 is an apocalyptic number.

1321628151 is a deficient number, since it is larger than the sum of its proper divisors (465362313).

1321628151 is an equidigital number, since it uses as much as digits as its factorization.

1321628151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6204901.

The product of its digits is 2880, while the sum is 30.

The square root of 1321628151 is about 36354.2040347468. The cubic root of 1321628151 is about 1097.4121399909.

Adding to 1321628151 its reverse (1518261231), we get a palindrome (2839889382).

The spelling of 1321628151 in words is "one billion, three hundred twenty-one million, six hundred twenty-eight thousand, one hundred fifty-one".