14345721 has 32 divisors (see below), whose sum is σ = 23896320. Its totient is φ = 8439552.

The previous prime is 14345717. The next prime is 14345743. The reversal of 14345721 is 12754341.

It is not a de Polignac number, because 14345721 - 2² = 14345717 is a prime.

It is a super-2 number, since 2×14345721² = 411599422019682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14345701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7185 + ... + 8961.

It is an arithmetic number, because the mean of its divisors is an integer number (746760).

Almost surely, 2^14345721 is an apocalyptic number.

It is an amenable number.

14345721 is a deficient number, since it is larger than the sum of its proper divisors (9550599).

14345721 is a wasteful number, since it uses less digits than its factorization.

14345721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1816 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 14345721 is about 3787.5745537217. The cubic root of 14345721 is about 242.9820136055.

The spelling of 14345721 in words is "fourteen million, three hundred forty-five thousand, seven hundred twenty-one".