6215145 has 16 divisors (see below), whose sum is σ = 9980160. Its totient is φ = 3302784.

The previous prime is 6215141. The next prime is 6215171. The reversal of 6215145 is 5415126.

6215145 = 217² + 218² + ... + 306².

It is not a de Polignac number, because 6215145 - 2² = 6215141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6215141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4941 + ... + 6069.

It is an arithmetic number, because the mean of its divisors is an integer number (623760).

Almost surely, 2^6215145 is an apocalyptic number.

It is an amenable number.

6215145 is a deficient number, since it is larger than the sum of its proper divisors (3765015).

6215145 is a wasteful number, since it uses less digits than its factorization.

6215145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504.

The product of its digits is 1200, while the sum is 24.

The square root of 6215145 is about 2493.0192538366. The cubic root of 6215145 is about 183.8585179718.

The spelling of 6215145 in words is "six million, two hundred fifteen thousand, one hundred forty-five".