6450981 has 16 divisors (see below), whose sum is σ = 8890560. Its totient is φ = 4158080.

The previous prime is 6450953. The next prime is 6451019. The reversal of 6450981 is 1890546.

It is a cyclic number.

It is not a de Polignac number, because 6450981 - 2⁵ = 6450949 is a prime.

It is a super-2 number, since 2×6450981² = 83230311724722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6450901) 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, 21871 + ... + 22163.

It is an arithmetic number, because the mean of its divisors is an integer number (555660).

Almost surely, 2^6450981 is an apocalyptic number.

It is an amenable number.

6450981 is a deficient number, since it is larger than the sum of its proper divisors (2439579).

6450981 is a wasteful number, since it uses less digits than its factorization.

6450981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 6450981 is about 2539.8781466834. The cubic root of 6450981 is about 186.1552351871.

The spelling of 6450981 in words is "six million, four hundred fifty thousand, nine hundred eighty-one".