1421421345 has 32 divisors (see below), whose sum is σ = 2536160640. Its totient is φ = 755334720.

The previous prime is 1421421317. The next prime is 1421421347. The reversal of 1421421345 is 5431241241.

It is not a de Polignac number, because 1421421345 - 2¹⁰ = 1421420321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1421421347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18390 + ... + 56400.

It is an arithmetic number, because the mean of its divisors is an integer number (79255020).

Almost surely, 2^1421421345 is an apocalyptic number.

1421421345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421421345 is a deficient number, since it is larger than the sum of its proper divisors (1114739295).

1421421345 is a wasteful number, since it uses less digits than its factorization.

1421421345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38302 (or 38296 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1421421345 is about 37701.7419358841. The cubic root of 1421421345 is about 1124.3657580558.

Adding to 1421421345 its reverse (5431241241), we get a palindrome (6852662586).

The spelling of 1421421345 in words is "one billion, four hundred twenty-one million, four hundred twenty-one thousand, three hundred forty-five".