6139561 has 8 divisors (see below), whose sum is σ = 6405120. Its totient is φ = 5877648.

The previous prime is 6139559. The next prime is 6139579. The reversal of 6139561 is 1659316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6139561 - 2¹ = 6139559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6139531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2850 + ... + 4516.

It is an arithmetic number, because the mean of its divisors is an integer number (800640).

Almost surely, 2^6139561 is an apocalyptic number.

It is an amenable number.

6139561 is a deficient number, since it is larger than the sum of its proper divisors (265559).

6139561 is a wasteful number, since it uses less digits than its factorization.

6139561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823.

The product of its digits is 4860, while the sum is 31.

The square root of 6139561 is about 2477.8137540986. The cubic root of 6139561 is about 183.1101589234.

The spelling of 6139561 in words is "six million, one hundred thirty-nine thousand, five hundred sixty-one".