6451945 has 8 divisors (see below), whose sum is σ = 7873920. Its totient is φ = 5073840.

The previous prime is 6451943. The next prime is 6451967. The reversal of 6451945 is 5491546.

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

It is not a de Polignac number, because 6451945 - 2¹ = 6451943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6451945.

It is not an unprimeable number, because it can be changed into a prime (6451943) 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, 10641 + ... + 11230.

It is an arithmetic number, because the mean of its divisors is an integer number (984240).

Almost surely, 2^6451945 is an apocalyptic number.

It is an amenable number.

6451945 is a deficient number, since it is larger than the sum of its proper divisors (1421975).

6451945 is a wasteful number, since it uses less digits than its factorization.

6451945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21935.

The product of its digits is 21600, while the sum is 34.

The square root of 6451945 is about 2540.0679124779. The cubic root of 6451945 is about 186.1645074052.

It can be divided in two parts, 6451 and 945, that added together give a square (7396 = 86²).

The spelling of 6451945 in words is "six million, four hundred fifty-one thousand, nine hundred forty-five".