1321450851 has 16 divisors (see below), whose sum is σ = 2132089344. Its totient is φ = 710696064.

The previous prime is 1321450847. The next prime is 1321450873. The reversal of 1321450851 is 1580541231.

It is not a de Polignac number, because 1321450851 - 2² = 1321450847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321450811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1850415 + ... + 1851128.

It is an arithmetic number, because the mean of its divisors is an integer number (133255584).

Almost surely, 2^1321450851 is an apocalyptic number.

1321450851 is a deficient number, since it is larger than the sum of its proper divisors (810638493).

1321450851 is a wasteful number, since it uses less digits than its factorization.

1321450851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701570.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 1321450851 is about 36351.7654454361. The cubic root of 1321450851 is about 1097.3630641915.

The spelling of 1321450851 in words is "one billion, three hundred twenty-one million, four hundred fifty thousand, eight hundred fifty-one".