72422401 has 2 divisors, whose sum is σ = 72422402. Its totient is φ = 72422400.

The previous prime is 72422393. The next prime is 72422407. The reversal of 72422401 is 10422427.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70157376 + 2265025 = 8376^2 + 1505^2 .

It is a cyclic number.

It is not a de Polignac number, because 72422401 - 2³ = 72422393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72422407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36211200 + 36211201.

It is an arithmetic number, because the mean of its divisors is an integer number (36211201).

Almost surely, 2^72422401 is an apocalyptic number.

It is an amenable number.

72422401 is a deficient number, since it is larger than the sum of its proper divisors (1).

72422401 is an equidigital number, since it uses as much as digits as its factorization.

72422401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 72422401 is about 8510.1351928157. The cubic root of 72422401 is about 416.8287246589.

Adding to 72422401 its reverse (10422427), we get a palindrome (82844828).

The spelling of 72422401 in words is "seventy-two million, four hundred twenty-two thousand, four hundred one".