1421215145 has 16 divisors (see below), whose sum is σ = 1994424960. Its totient is φ = 951882624.

The previous prime is 1421215127. The next prime is 1421215157. The reversal of 1421215145 is 5415121241.

It is a happy number.

It is not a de Polignac number, because 1421215145 - 2⁸ = 1421214889 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, 470660 + ... + 473669.

It is an arithmetic number, because the mean of its divisors is an integer number (124651560).

Almost surely, 2^1421215145 is an apocalyptic number.

It is an amenable number.

1421215145 is a deficient number, since it is larger than the sum of its proper divisors (573209815).

1421215145 is an equidigital number, since it uses as much as digits as its factorization.

1421215145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944384.

The product of its digits is 1600, while the sum is 26.

The square root of 1421215145 is about 37699.0072150448. The cubic root of 1421215145 is about 1124.3113863215.

Adding to 1421215145 its reverse (5415121241), we get a palindrome (6836336386).

The spelling of 1421215145 in words is "one billion, four hundred twenty-one million, two hundred fifteen thousand, one hundred forty-five".