5851649 has 4 divisors (see below), whose sum is σ = 6053460. Its totient is φ = 5649840.

The previous prime is 5851627. The next prime is 5851673. The reversal of 5851649 is 9461585.

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 1575025 + 4276624 = 1255^2 + 2068^2 .

It is a cyclic number.

It is not a de Polignac number, because 5851649 - 2¹⁶ = 5786113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5851619) 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, 100862 + ... + 100919.

It is an arithmetic number, because the mean of its divisors is an integer number (1513365).

Almost surely, 2^5851649 is an apocalyptic number.

It is an amenable number.

5851649 is a deficient number, since it is larger than the sum of its proper divisors (201811).

5851649 is a wasteful number, since it uses less digits than its factorization.

5851649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201810.

The product of its digits is 43200, while the sum is 38.

The square root of 5851649 is about 2419.0181892661. The cubic root of 5851649 is about 180.2019236036.

The spelling of 5851649 in words is "five million, eight hundred fifty-one thousand, six hundred forty-nine".