1427785321 has 8 divisors (see below), whose sum is σ = 1474667264. Its totient is φ = 1380954960.

The previous prime is 1427785291. The next prime is 1427785327. The reversal of 1427785321 is 1235877241.

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 1427785321 - 2¹³ = 1427777129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1427785327) 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, 48010 + ... + 71836.

It is an arithmetic number, because the mean of its divisors is an integer number (184333408).

Almost surely, 2^1427785321 is an apocalyptic number.

It is an amenable number.

1427785321 is a deficient number, since it is larger than the sum of its proper divisors (46881943).

1427785321 is a wasteful number, since it uses less digits than its factorization.

1427785321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25791.

The product of its digits is 94080, while the sum is 40.

The square root of 1427785321 is about 37786.0466442310. The cubic root of 1427785321 is about 1126.0412604096.

The spelling of 1427785321 in words is "one billion, four hundred twenty-seven million, seven hundred eighty-five thousand, three hundred twenty-one".