1321857201 has 8 divisors (see below), whose sum is σ = 2014258624. Its totient is φ = 755346960.

The previous prime is 1321857167. The next prime is 1321857211. The reversal of 1321857201 is 1027581231.

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

It is not a de Polignac number, because 1321857201 - 2⁷ = 1321857073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321857211) 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, 31472770 + ... + 31472811.

It is an arithmetic number, because the mean of its divisors is an integer number (251782328).

Almost surely, 2^1321857201 is an apocalyptic number.

It is an amenable number.

1321857201 is a deficient number, since it is larger than the sum of its proper divisors (692401423).

1321857201 is an equidigital number, since it uses as much as digits as its factorization.

1321857201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62945591.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1321857201 is about 36357.3541529083. The cubic root of 1321857201 is about 1097.4755334476.

The spelling of 1321857201 in words is "one billion, three hundred twenty-one million, eight hundred fifty-seven thousand, two hundred one".