6261645 has 32 divisors (see below), whose sum is σ = 10910592. Its totient is φ = 3048192.

The previous prime is 6261637. The next prime is 6261649. The reversal of 6261645 is 5461626.

It is not a de Polignac number, because 6261645 - 2³ = 6261637 is a prime.

It is a super-3 number, since 3×6261645³ (a number of 21 digits) contains 333 as substring.

6261645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6261649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31687 + ... + 31883.

It is an arithmetic number, because the mean of its divisors is an integer number (340956).

Almost surely, 2^6261645 is an apocalyptic number.

6261645 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6261645 is a deficient number, since it is larger than the sum of its proper divisors (4648947).

6261645 is a wasteful number, since it uses less digits than its factorization.

6261645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381.

The product of its digits is 8640, while the sum is 30.

The square root of 6261645 is about 2502.3279161613. The cubic root of 6261645 is about 184.3159054127.

The spelling of 6261645 in words is "six million, two hundred sixty-one thousand, six hundred forty-five".