11421739 has 16 divisors (see below), whose sum is σ = 14164416. Its totient is φ = 8985600.

The previous prime is 11421721. The next prime is 11421749. The reversal of 11421739 is 93712411.

It is a cyclic number.

It is not a de Polignac number, because 11421739 - 2¹⁹ = 10897451 is a prime.

It is a super-3 number, since 3×11421739³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (11421749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3709 + ... + 6049.

It is an arithmetic number, because the mean of its divisors is an integer number (885276).

Almost surely, 2^11421739 is an apocalyptic number.

11421739 is a deficient number, since it is larger than the sum of its proper divisors (2742677).

11421739 is a wasteful number, since it uses less digits than its factorization.

11421739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406.

The product of its digits is 1512, while the sum is 28.

The square root of 11421739 is about 3379.6063380222. The cubic root of 11421739 is about 225.2046795928.

The spelling of 11421739 in words is "eleven million, four hundred twenty-one thousand, seven hundred thirty-nine".