7862641 has 2 divisors, whose sum is σ = 7862642. Its totient is φ = 7862640.

The previous prime is 7862639. The next prime is 7862669. The reversal of 7862641 is 1462687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7862416 + 225 = 2804^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 7862641 - 2¹ = 7862639 is a prime.

It is a super-2 number, since 2×7862641² = 123642246989762, which contains 22 as substring.

Together with 7862639, it forms a pair of twin primes.

7862641 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7862597 and 7862606.

It is not a weakly prime, because it can be changed into another prime (7862441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3931320 + 3931321.

It is an arithmetic number, because the mean of its divisors is an integer number (3931321).

Almost surely, 2^7862641 is an apocalyptic number.

It is an amenable number.

7862641 is a deficient number, since it is larger than the sum of its proper divisors (1).

7862641 is an equidigital number, since it uses as much as digits as its factorization.

7862641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 7862641 is about 2804.0401209683. The cubic root of 7862641 is about 198.8487272379.

The spelling of 7862641 in words is "seven million, eight hundred sixty-two thousand, six hundred forty-one".