65406442 has 16 divisors (see below), whose sum is σ = 99440640. Its totient is φ = 32262192.

The previous prime is 65406427. The next prime is 65406443. The reversal of 65406442 is 24460456.

It is not an unprimeable number, because it can be changed into a prime (65406443) 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, 78484 + ... + 79312.

It is an arithmetic number, because the mean of its divisors is an integer number (6215040).

Almost surely, 2^65406442 is an apocalyptic number.

65406442 is a deficient number, since it is larger than the sum of its proper divisors (34034198).

65406442 is a wasteful number, since it uses less digits than its factorization.

65406442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 65406442 is about 8087.4249300998. The cubic root of 65406442 is about 402.9088822317.

Adding to 65406442 its reverse (24460456), we get a palindrome (89866898).

The spelling of 65406442 in words is "sixty-five million, four hundred six thousand, four hundred forty-two".