6420712 has 8 divisors (see below), whose sum is σ = 12038850. Its totient is φ = 3210352.

The previous prime is 6420709. The next prime is 6420731. The reversal of 6420712 is 2170246.

It can be written as a sum of positive squares in only one way, i.e., 5134756 + 1285956 = 2266^2 + 1134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401287 + ... + 401302.

Almost surely, 2^6420712 is an apocalyptic number.

It is an amenable number.

6420712 is a deficient number, since it is larger than the sum of its proper divisors (5618138).

6420712 is a wasteful number, since it uses less digits than its factorization.

6420712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802595 (or 802591 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 6420712 is about 2533.9123899614. The cubic root of 6420712 is about 185.8636222333.

Adding to 6420712 its reverse (2170246), we get a palindrome (8590958).

The spelling of 6420712 in words is "six million, four hundred twenty thousand, seven hundred twelve".