72477245 has 4 divisors (see below), whose sum is σ = 86972700. Its totient is φ = 57981792.

The previous prime is 72477221. The next prime is 72477259. The reversal of 72477245 is 54277427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54277427 = 839 ⋅64693.

It can be written as a sum of positive squares in 2 ways, for example, as 55920484 + 16556761 = 7478^2 + 4069^2 .

It is a cyclic number.

It is not a de Polignac number, because 72477245 - 2¹⁶ = 72411709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72477199 and 72477208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7247720 + ... + 7247729.

It is an arithmetic number, because the mean of its divisors is an integer number (21743175).

Almost surely, 2^72477245 is an apocalyptic number.

It is an amenable number.

72477245 is a deficient number, since it is larger than the sum of its proper divisors (14495455).

72477245 is a wasteful number, since it uses less digits than its factorization.

72477245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14495454.

The product of its digits is 109760, while the sum is 38.

The square root of 72477245 is about 8513.3568584901. The cubic root of 72477245 is about 416.9339167269.

The spelling of 72477245 in words is "seventy-two million, four hundred seventy-seven thousand, two hundred forty-five".