1421143394 has 16 divisors (see below), whose sum is σ = 2382228576. Its totient is φ = 630218400.

The previous prime is 1421143393. The next prime is 1421143429. The reversal of 1421143394 is 4933411241.

It is a self number, because there is not a number n which added to its sum of digits gives 1421143394.

It is not an unprimeable number, because it can be changed into a prime (1421143391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786872 + ... + 788675.

It is an arithmetic number, because the mean of its divisors is an integer number (148889286).

Almost surely, 2^1421143394 is an apocalyptic number.

1421143394 is a deficient number, since it is larger than the sum of its proper divisors (961085182).

1421143394 is a wasteful number, since it uses less digits than its factorization.

1421143394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575601.

The product of its digits is 10368, while the sum is 32.

The square root of 1421143394 is about 37698.0555731990. The cubic root of 1421143394 is about 1124.2924654649.

The spelling of 1421143394 in words is "one billion, four hundred twenty-one million, one hundred forty-three thousand, three hundred ninety-four".