6145561 has 4 divisors (see below), whose sum is σ = 6160000. Its totient is φ = 6131124.

The previous prime is 6145553. The next prime is 6145583. The reversal of 6145561 is 1655416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6145561 - 2³ = 6145553 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6145511) 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, 6561 + ... + 7438.

It is an arithmetic number, because the mean of its divisors is an integer number (1540000).

Almost surely, 2^6145561 is an apocalyptic number.

It is an amenable number.

6145561 is a deficient number, since it is larger than the sum of its proper divisors (14439).

6145561 is a wasteful number, since it uses less digits than its factorization.

6145561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14438.

The product of its digits is 3600, while the sum is 28.

The square root of 6145561 is about 2479.0242031896. The cubic root of 6145561 is about 183.1697887705.

It can be divided in two parts, 61455 and 61, that added together give a palindrome (61516).

The spelling of 6145561 in words is "six million, one hundred forty-five thousand, five hundred sixty-one".