8402641 has 16 divisors (see below), whose sum is σ = 9679824. Its totient is φ = 7225344.

The previous prime is 8402633. The next prime is 8402651. The reversal of 8402641 is 1462048.

It can be written as a sum of positive squares in 8 ways, for example, as 160000 + 8242641 = 400^2 + 2871^2 .

It is a cyclic number.

It is not a de Polignac number, because 8402641 - 2³ = 8402633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8402651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42555 + ... + 42751.

It is an arithmetic number, because the mean of its divisors is an integer number (604989).

Almost surely, 2^8402641 is an apocalyptic number.

It is an amenable number.

8402641 is a deficient number, since it is larger than the sum of its proper divisors (1277183).

8402641 is a wasteful number, since it uses less digits than its factorization.

8402641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 8402641 is about 2898.7309292171. The cubic root of 8402641 is about 203.3005731210.

Adding to 8402641 its reverse (1462048), we get a palindrome (9864689).

It can be divided in two parts, 840 and 2641, that added together give a square (3481 = 59²).

The spelling of 8402641 in words is "eight million, four hundred two thousand, six hundred forty-one".