6451240 has 16 divisors (see below), whose sum is σ = 14515380. Its totient is φ = 2580480.

The previous prime is 6451231. The next prime is 6451259. The reversal of 6451240 is 421546.

It can be written as a sum of positive squares in 2 ways, for example, as 6320196 + 131044 = 2514^2 + 362^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80601 + ... + 80680.

Almost surely, 2^6451240 is an apocalyptic number.

It is an amenable number.

6451240 is an abundant number, since it is smaller than the sum of its proper divisors (8064140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6451240 is a wasteful number, since it uses less digits than its factorization.

6451240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161292 (or 161288 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 6451240 is about 2539.9291328697. The cubic root of 6451240 is about 186.1577264650.

Adding to 6451240 its reverse (421546), we get a palindrome (6872786).

The spelling of 6451240 in words is "six million, four hundred fifty-one thousand, two hundred forty".