72421067 has 2 divisors, whose sum is σ = 72421068. Its totient is φ = 72421066.

The previous prime is 72421009. The next prime is 72421079. The reversal of 72421067 is 76012427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72421067 - 2¹⁰ = 72420043 is a prime.

It is not a weakly prime, because it can be changed into another prime (72421967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36210533 + 36210534.

It is an arithmetic number, because the mean of its divisors is an integer number (36210534).

Almost surely, 2^72421067 is an apocalyptic number.

72421067 is a deficient number, since it is larger than the sum of its proper divisors (1).

72421067 is an equidigital number, since it uses as much as digits as its factorization.

72421067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 72421067 is about 8510.0568153215. The cubic root of 72421067 is about 416.8261653544.

The spelling of 72421067 in words is "seventy-two million, four hundred twenty-one thousand, sixty-seven".