1421243144 has 16 divisors (see below), whose sum is σ = 2667159420. Its totient is φ = 710000640.

The previous prime is 1421243137. The next prime is 1421243167. The reversal of 1421243144 is 4413421241.

It can be written as a sum of positive squares in 2 ways, for example, as 1335902500 + 85340644 = 36550^2 + 9238^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67817 + ... + 86264.

Almost surely, 2^1421243144 is an apocalyptic number.

It is an amenable number.

1421243144 is a deficient number, since it is larger than the sum of its proper divisors (1245916276).

1421243144 is a wasteful number, since it uses less digits than its factorization.

1421243144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155240 (or 155236 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

The square root of 1421243144 is about 37699.3785625174. The cubic root of 1421243144 is about 1124.3187695310.

Adding to 1421243144 its reverse (4413421241), we get a palindrome (5834664385).

The spelling of 1421243144 in words is "one billion, four hundred twenty-one million, two hundred forty-three thousand, one hundred forty-four".