1421355565 has 8 divisors (see below), whose sum is σ = 1949287680. Its totient is φ = 974643792.

The previous prime is 1421355557. The next prime is 1421355577. The reversal of 1421355565 is 5655531241.

It is a happy number.

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 1421355565 - 2³ = 1421355557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20305045 + ... + 20305114.

It is an arithmetic number, because the mean of its divisors is an integer number (243660960).

Almost surely, 2^1421355565 is an apocalyptic number.

It is an amenable number.

1421355565 is a deficient number, since it is larger than the sum of its proper divisors (527932115).

1421355565 is an equidigital number, since it uses as much as digits as its factorization.

1421355565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40610171.

The product of its digits is 90000, while the sum is 37.

The square root of 1421355565 is about 37700.8695523061. The cubic root of 1421355565 is about 1124.3484134636.

The spelling of 1421355565 in words is "one billion, four hundred twenty-one million, three hundred fifty-five thousand, five hundred sixty-five".