72505501 has 8 divisors (see below), whose sum is σ = 76403520. Its totient is φ = 68615712.

The previous prime is 72505483. The next prime is 72505529. The reversal of 72505501 is 10550527.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72505501 - 2¹³ = 72497309 is a prime.

It is a super-2 number, since 2×72505501² = 10514095350522002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72506501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25896 + ... + 28558.

It is an arithmetic number, because the mean of its divisors is an integer number (9550440).

Almost surely, 2^72505501 is an apocalyptic number.

It is an amenable number.

72505501 is a deficient number, since it is larger than the sum of its proper divisors (3898019).

72505501 is a wasteful number, since it uses less digits than its factorization.

72505501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 72505501 is about 8515.0162066786. The cubic root of 72505501 is about 416.9880916803.

The spelling of 72505501 in words is "seventy-two million, five hundred five thousand, five hundred one".