427221401 has 2 divisors, whose sum is σ = 427221402. Its totient is φ = 427221400.

The previous prime is 427221391. The next prime is 427221433. The reversal of 427221401 is 104122724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342213001 + 85008400 = 18499^2 + 9220^2 .

It is a cyclic number.

It is not a de Polignac number, because 427221401 - 2²² = 423027097 is a prime.

It is not a weakly prime, because it can be changed into another prime (427221461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213610700 + 213610701.

It is an arithmetic number, because the mean of its divisors is an integer number (213610701).

Almost surely, 2^427221401 is an apocalyptic number.

It is an amenable number.

427221401 is a deficient number, since it is larger than the sum of its proper divisors (1).

427221401 is an equidigital number, since it uses as much as digits as its factorization.

427221401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 427221401 is about 20669.3347981980. The cubic root of 427221401 is about 753.1549474292.

The spelling of 427221401 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, four hundred one".