65542945 has 8 divisors (see below), whose sum is σ = 84701736. Its totient is φ = 48400896.

The previous prime is 65542943. The next prime is 65542949. The reversal of 65542945 is 54924556.

It can be written as a sum of positive squares in 4 ways, for example, as 5216656 + 60326289 = 2284^2 + 7767^2 .

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 65542945 - 2¹ = 65542943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65542898 and 65542907.

It is not an unprimeable number, because it can be changed into a prime (65542943) 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, 504112 + ... + 504241.

It is an arithmetic number, because the mean of its divisors is an integer number (10587717).

Almost surely, 2^65542945 is an apocalyptic number.

65542945 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65542945 is a deficient number, since it is larger than the sum of its proper divisors (19158791).

65542945 is a wasteful number, since it uses less digits than its factorization.

65542945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008371.

The product of its digits is 216000, while the sum is 40.

The square root of 65542945 is about 8095.8597443385. The cubic root of 65542945 is about 403.1889772467.

The spelling of 65542945 in words is "sixty-five million, five hundred forty-two thousand, nine hundred forty-five".