72420205 has 16 divisors (see below), whose sum is σ = 102098304. Its totient is φ = 48617280.

The previous prime is 72420203. The next prime is 72420209. The reversal of 72420205 is 50202427.

It is not a de Polignac number, because 72420205 - 2¹ = 72420203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72420203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49929 + ... + 51358.

It is an arithmetic number, because the mean of its divisors is an integer number (6381144).

Almost surely, 2^72420205 is an apocalyptic number.

It is an amenable number.

72420205 is a deficient number, since it is larger than the sum of its proper divisors (29678099).

72420205 is a wasteful number, since it uses less digits than its factorization.

72420205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101316.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 72420205 is about 8510.0061692105. The cubic root of 72420205 is about 416.8245115742.

The spelling of 72420205 in words is "seventy-two million, four hundred twenty thousand, two hundred five".