6429861 has 20 divisors (see below), whose sum is σ = 9683872. Its totient is φ = 4251528.

The previous prime is 6429799. The next prime is 6429869. The reversal of 6429861 is 1689246.

6429861 is a `hidden beast` number, since 642 + 9 + 8 + 6 + 1 = 666.

It is not a de Polignac number, because 6429861 - 2¹⁹ = 5905573 is a prime.

It is a super-2 number, since 2×6429861² = 82686224958642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6429869) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12960 + ... + 13446.

Almost surely, 2^6429861 is an apocalyptic number.

It is an amenable number.

6429861 is a deficient number, since it is larger than the sum of its proper divisors (3254011).

6429861 is a wasteful number, since it uses less digits than its factorization.

6429861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 653 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 6429861 is about 2535.7170583486. The cubic root of 6429861 is about 185.9518605908.

The spelling of 6429861 in words is "six million, four hundred twenty-nine thousand, eight hundred sixty-one".