72420151 has 2 divisors, whose sum is σ = 72420152. Its totient is φ = 72420150.

The previous prime is 72420149. The next prime is 72420157. The reversal of 72420151 is 15102427.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (15102427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72420151 - 2¹ = 72420149 is a prime.

Together with 72420149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72420157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36210075 + 36210076.

It is an arithmetic number, because the mean of its divisors is an integer number (36210076).

Almost surely, 2^72420151 is an apocalyptic number.

72420151 is a deficient number, since it is larger than the sum of its proper divisors (1).

72420151 is an equidigital number, since it uses as much as digits as its factorization.

72420151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 72420151 is about 8510.0029964742. The cubic root of 72420151 is about 416.8244079727.

Adding to 72420151 its reverse (15102427), we get a palindrome (87522578).

The spelling of 72420151 in words is "seventy-two million, four hundred twenty thousand, one hundred fifty-one".