6511402 has 4 divisors (see below), whose sum is σ = 9767106. Its totient is φ = 3255700.

The previous prime is 6511387. The next prime is 6511411. The reversal of 6511402 is 2041156.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3651921 + 2859481 = 1911^2 + 1691^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6511402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1627849 + ... + 1627852.

Almost surely, 2^6511402 is an apocalyptic number.

6511402 is a deficient number, since it is larger than the sum of its proper divisors (3255704).

6511402 is a wasteful number, since it uses less digits than its factorization.

6511402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255703.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 6511402 is about 2551.7448932054. The cubic root of 6511402 is about 186.7346174100.

Adding to 6511402 its reverse (2041156), we get a palindrome (8552558).

The spelling of 6511402 in words is "six million, five hundred eleven thousand, four hundred two".