65402641 has 4 divisors (see below), whose sum is σ = 65546212. Its totient is φ = 65259072.

The previous prime is 65402633. The next prime is 65402647. The reversal of 65402641 is 14620456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20793600 + 44609041 = 4560^2 + 6679^2 .

It is a cyclic number.

It is not a de Polignac number, because 65402641 - 2³ = 65402633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65402647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71100 + ... + 72013.

It is an arithmetic number, because the mean of its divisors is an integer number (16386553).

Almost surely, 2^65402641 is an apocalyptic number.

It is an amenable number.

65402641 is a deficient number, since it is larger than the sum of its proper divisors (143571).

65402641 is a wasteful number, since it uses less digits than its factorization.

65402641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143570.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 65402641 is about 8087.1899322323. The cubic root of 65402641 is about 402.9010772598.

The spelling of 65402641 in words is "sixty-five million, four hundred two thousand, six hundred forty-one".