72490001 has 2 divisors, whose sum is σ = 72490002. Its totient is φ = 72490000.

The previous prime is 72489983. The next prime is 72490003. The reversal of 72490001 is 10009427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50069776 + 22420225 = 7076^2 + 4735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72490001 is a prime.

Together with 72490003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72490003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36245000 + 36245001.

It is an arithmetic number, because the mean of its divisors is an integer number (36245001).

Almost surely, 2^72490001 is an apocalyptic number.

It is an amenable number.

72490001 is a deficient number, since it is larger than the sum of its proper divisors (1).

72490001 is an equidigital number, since it uses as much as digits as its factorization.

72490001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 72490001 is about 8514.1060012194. The cubic root of 72490001 is about 416.9583754245.

Adding to 72490001 its reverse (10009427), we get a palindrome (82499428).

The spelling of 72490001 in words is "seventy-two million, four hundred ninety thousand, one".