72422461 has 2 divisors, whose sum is σ = 72422462. Its totient is φ = 72422460.

The previous prime is 72422419. The next prime is 72422507. The reversal of 72422461 is 16422427.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43639236 + 28783225 = 6606^2 + 5365^2 .

It is a cyclic number.

It is not a de Polignac number, because 72422461 - 2¹⁵ = 72389693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72422401) 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 as a sum of consecutive naturals, namely, 36211230 + 36211231.

It is an arithmetic number, because the mean of its divisors is an integer number (36211231).

Almost surely, 2^72422461 is an apocalyptic number.

It is an amenable number.

72422461 is a deficient number, since it is larger than the sum of its proper divisors (1).

72422461 is an equidigital number, since it uses as much as digits as its factorization.

72422461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 28.

The square root of 72422461 is about 8510.1387180233. The cubic root of 72422461 is about 416.8288397693.

Adding to 72422461 its reverse (16422427), we get a palindrome (88844888).

The spelling of 72422461 in words is "seventy-two million, four hundred twenty-two thousand, four hundred sixty-one".