22061405 has 4 divisors (see below), whose sum is σ = 26473692. Its totient is φ = 17649120.

The previous prime is 22061401. The next prime is 22061411. The reversal of 22061405 is 50416022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50416022 = 2 ⋅25208011.

It can be written as a sum of positive squares in 2 ways, for example, as 15856324 + 6205081 = 3982^2 + 2491^2 .

It is not a de Polignac number, because 22061405 - 2² = 22061401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22061401) 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 3 ways as a sum of consecutive naturals, for example, 2206136 + ... + 2206145.

It is an arithmetic number, because the mean of its divisors is an integer number (6618423).

Almost surely, 2^22061405 is an apocalyptic number.

It is an amenable number.

22061405 is a deficient number, since it is larger than the sum of its proper divisors (4412287).

22061405 is an equidigital number, since it uses as much as digits as its factorization.

22061405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4412286.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22061405 is about 4696.9569936290. The cubic root of 22061405 is about 280.4643866907.

Adding to 22061405 its reverse (50416022), we get a palindrome (72477427).

The spelling of 22061405 in words is "twenty-two million, sixty-one thousand, four hundred five".