6397556 has 12 divisors (see below), whose sum is σ = 12213600. Its totient is φ = 2907960.

The previous prime is 6397553. The next prime is 6397571. The reversal of 6397556 is 6557936.

6397556 = T₂₄₃ + T₂₄₄ + ... + T₃₇₄.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6397553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72656 + ... + 72743.

It is an arithmetic number, because the mean of its divisors is an integer number (1017800).

Almost surely, 2^6397556 is an apocalyptic number.

It is an amenable number.

6397556 is a deficient number, since it is larger than the sum of its proper divisors (5816044).

6397556 is a wasteful number, since it uses less digits than its factorization.

6397556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145414 (or 145412 counting only the distinct ones).

The product of its digits is 170100, while the sum is 41.

The square root of 6397556 is about 2529.3390440983. The cubic root of 6397556 is about 185.6399169124.

Adding to 6397556 its product of digits (170100), we get a palindrome (6567656).

It can be divided in two parts, 639 and 7556, that multiplied together give a palindrome (4828284).

The spelling of 6397556 in words is "six million, three hundred ninety-seven thousand, five hundred fifty-six".