1421421645 has 48 divisors (see below), whose sum is σ = 2664809280. Its totient is φ = 645071616.

The previous prime is 1421421623. The next prime is 1421421709. The reversal of 1421421645 is 5461241241.

It is not a de Polignac number, because 1421421645 - 2²¹ = 1419324493 is a prime.

It is a super-3 number, since 3×1421421645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95209 + ... + 109121.

It is an arithmetic number, because the mean of its divisors is an integer number (55516860).

Almost surely, 2^1421421645 is an apocalyptic number.

1421421645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421421645 is a deficient number, since it is larger than the sum of its proper divisors (1243387635).

1421421645 is a wasteful number, since it uses less digits than its factorization.

1421421645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14074 (or 14067 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 1421421645 is about 37701.7459144799. The cubic root of 1421421645 is about 1124.3658371573.

Adding to 1421421645 its reverse (5461241241), we get a palindrome (6882662886).

The spelling of 1421421645 in words is "one billion, four hundred twenty-one million, four hundred twenty-one thousand, six hundred forty-five".