78252545 has 16 divisors (see below), whose sum is σ = 112967040. Its totient is φ = 50834304.

The previous prime is 78252529. The next prime is 78252553. The reversal of 78252545 is 54525287.

It is a cyclic number.

It is not a de Polignac number, because 78252545 - 2⁴ = 78252529 is a prime.

It is a super-2 number, since 2×78252545² = 12246921597954050, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78252499 and 78252508.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58172 + ... + 59501.

It is an arithmetic number, because the mean of its divisors is an integer number (7060440).

Almost surely, 2^78252545 is an apocalyptic number.

It is an amenable number.

78252545 is a deficient number, since it is larger than the sum of its proper divisors (34714495).

78252545 is a wasteful number, since it uses less digits than its factorization.

78252545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117704.

The product of its digits is 112000, while the sum is 38.

The square root of 78252545 is about 8846.0468572125. The cubic root of 78252545 is about 427.7264989913.

The spelling of 78252545 in words is "seventy-eight million, two hundred fifty-two thousand, five hundred forty-five".