72154601 has 4 divisors (see below), whose sum is σ = 72171600. Its totient is φ = 72137604.

The previous prime is 72154597. The next prime is 72154603. The reversal of 72154601 is 10645127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 72154601 - 2² = 72154597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72154603) 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, 3830 + ... + 12608.

It is an arithmetic number, because the mean of its divisors is an integer number (18042900).

Almost surely, 2^72154601 is an apocalyptic number.

It is an amenable number.

72154601 is a deficient number, since it is larger than the sum of its proper divisors (16999).

72154601 is an equidigital number, since it uses as much as digits as its factorization.

72154601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16998.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 72154601 is about 8494.3864404676. The cubic root of 72154601 is about 416.3143138157.

Adding to 72154601 its reverse (10645127), we get a palindrome (82799728).

The spelling of 72154601 in words is "seventy-two million, one hundred fifty-four thousand, six hundred one".