1420021965 has 16 divisors (see below), whose sum is σ = 2272729536. Its totient is φ = 757113600.

The previous prime is 1420021937. The next prime is 1420021973. The reversal of 1420021965 is 5691200241.

It is not a de Polignac number, because 1420021965 - 2¹² = 1420017869 is a prime.

It is a super-2 number, since 2×1420021965² = 4032924762164922450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43830 + ... + 69000.

It is an arithmetic number, because the mean of its divisors is an integer number (142045596).

Almost surely, 2^1420021965 is an apocalyptic number.

1420021965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1420021965 is a deficient number, since it is larger than the sum of its proper divisors (852707571).

1420021965 is a wasteful number, since it uses less digits than its factorization.

1420021965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28940.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1420021965 is about 37683.1788069956. The cubic root of 1420021965 is about 1123.9966599973.

The spelling of 1420021965 in words is "one billion, four hundred twenty million, twenty-one thousand, nine hundred sixty-five".