1420401565 has 8 divisors (see below), whose sum is σ = 1859434848. Its totient is φ = 1033019280.

The previous prime is 1420401559. The next prime is 1420401569. The reversal of 1420401565 is 5651040241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1420401565 - 2⁵ = 1420401533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420401569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12912687 + ... + 12912796.

It is an arithmetic number, because the mean of its divisors is an integer number (232429356).

Almost surely, 2^1420401565 is an apocalyptic number.

It is an amenable number.

1420401565 is a deficient number, since it is larger than the sum of its proper divisors (439033283).

1420401565 is a wasteful number, since it uses less digits than its factorization.

1420401565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25825499.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1420401565 is about 37688.2152005106. The cubic root of 1420401565 is about 1124.0968065982.

The spelling of 1420401565 in words is "one billion, four hundred twenty million, four hundred one thousand, five hundred sixty-five".