1427257321 has 32 divisors (see below), whose sum is σ = 1774386432. Its totient is φ = 1120296960.

The previous prime is 1427257309. The next prime is 1427257331. The reversal of 1427257321 is 1237527241.

It is a cyclic number.

It is not a de Polignac number, because 1427257321 - 2²¹ = 1425160169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1427257331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 703110 + ... + 705136.

It is an arithmetic number, because the mean of its divisors is an integer number (55449576).

Almost surely, 2^1427257321 is an apocalyptic number.

It is an amenable number.

1427257321 is a deficient number, since it is larger than the sum of its proper divisors (347129111).

1427257321 is a wasteful number, since it uses less digits than its factorization.

1427257321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209.

The product of its digits is 23520, while the sum is 34.

The square root of 1427257321 is about 37779.0592921528. The cubic root of 1427257321 is about 1125.9024386318.

The spelling of 1427257321 in words is "one billion, four hundred twenty-seven million, two hundred fifty-seven thousand, three hundred twenty-one".