22129001 has 8 divisors (see below), whose sum is σ = 23207880. Its totient is φ = 21071232.

The previous prime is 22128989. The next prime is 22129007. The reversal of 22129001 is 10092122.

It can be written as a sum of positive squares in 4 ways, for example, as 10569001 + 11560000 = 3251^2 + 3400^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22129001 - 2⁶ = 22128937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22129007) 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, 3110 + ... + 7343.

It is an arithmetic number, because the mean of its divisors is an integer number (2900985).

Almost surely, 2^22129001 is an apocalyptic number.

It is an amenable number.

22129001 is a deficient number, since it is larger than the sum of its proper divisors (1078879).

22129001 is a wasteful number, since it uses less digits than its factorization.

22129001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10555.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 22129001 is about 4704.1472128325. The cubic root of 22129001 is about 280.7505416433.

The spelling of 22129001 in words is "twenty-two million, one hundred twenty-nine thousand, one".