1421564387 has 2 divisors, whose sum is σ = 1421564388. Its totient is φ = 1421564386.

The previous prime is 1421564377. The next prime is 1421564413. The reversal of 1421564387 is 7834651241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421564387 - 2²⁴ = 1404787171 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421564377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710782193 + 710782194.

It is an arithmetic number, because the mean of its divisors is an integer number (710782194).

Almost surely, 2^1421564387 is an apocalyptic number.

1421564387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421564387 is an equidigital number, since it uses as much as digits as its factorization.

1421564387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 1421564387 is about 37703.6389092618. The cubic root of 1421564387 is about 1124.4034729184.

The spelling of 1421564387 in words is "one billion, four hundred twenty-one million, five hundred sixty-four thousand, three hundred eighty-seven".