1421424016724 has 6 divisors (see below), whose sum is σ = 2487492029274. Its totient is φ = 710712008360.

The previous prime is 1421424016693. The next prime is 1421424016739. The reversal of 1421424016724 is 4276104241241.

It can be written as a sum of positive squares in only one way, i.e., 1396438524100 + 24985492624 = 1181710^2 + 158068^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177678002087 + ... + 177678002094.

It is an arithmetic number, because the mean of its divisors is an integer number (414582004879).

Almost surely, 2^{1421424016724} is an apocalyptic number.

It is an amenable number.

1421424016724 is a deficient number, since it is larger than the sum of its proper divisors (1066068012550).

1421424016724 is a wasteful number, since it uses less digits than its factorization.

1421424016724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355356004185 (or 355356004183 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

Adding to 1421424016724 its reverse (4276104241241), we get a palindrome (5697528257965).

The spelling of 1421424016724 in words is "one trillion, four hundred twenty-one billion, four hundred twenty-four million, sixteen thousand, seven hundred twenty-four".