72298451 has 4 divisors (see below), whose sum is σ = 72316392. Its totient is φ = 72280512.

The previous prime is 72298441. The next prime is 72298463. The reversal of 72298451 is 15489227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72298451 - 2¹⁰ = 72297427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72298411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200 + ... + 12026.

It is an arithmetic number, because the mean of its divisors is an integer number (18079098).

Almost surely, 2^72298451 is an apocalyptic number.

72298451 is a deficient number, since it is larger than the sum of its proper divisors (17941).

72298451 is a wasteful number, since it uses less digits than its factorization.

72298451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17940.

The product of its digits is 40320, while the sum is 38.

The square root of 72298451 is about 8502.8495811698. The cubic root of 72298451 is about 416.5907898811.

The spelling of 72298451 in words is "seventy-two million, two hundred ninety-eight thousand, four hundred fifty-one".