1421224145 has 16 divisors (see below), whose sum is σ = 1861410240. Its totient is φ = 1033118400.

The previous prime is 1421224099. The next prime is 1421224153. The reversal of 1421224145 is 5414221241.

It is not a de Polignac number, because 1421224145 - 2¹⁰ = 1421223121 is a prime.

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, 139226 + ... + 149084.

It is an arithmetic number, because the mean of its divisors is an integer number (116338140).

Almost surely, 2^1421224145 is an apocalyptic number.

It is an amenable number.

1421224145 is a deficient number, since it is larger than the sum of its proper divisors (440186095).

1421224145 is a wasteful number, since it uses less digits than its factorization.

1421224145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12496.

The product of its digits is 2560, while the sum is 26.

The square root of 1421224145 is about 37699.1265813944. The cubic root of 1421224145 is about 1124.3137595913.

Adding to 1421224145 its reverse (5414221241), we get a palindrome (6835445386).

The spelling of 1421224145 in words is "one billion, four hundred twenty-one million, two hundred twenty-four thousand, one hundred forty-five".