1397556 has 18 divisors (see below), whose sum is σ = 3532802. Its totient is φ = 465840.

The previous prime is 1397551. The next prime is 1397563. The reversal of 1397556 is 6557931.

It is a happy number.

1397556 is a `hidden beast` number, since 13 + 97 + 556 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1245456 + 152100 = 1116^2 + 390^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 38821 = 1397556 / (1 + 3 + 9 + 7 + 5 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 1397556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19375 + ... + 19446.

2^1397556 is an apocalyptic number.

It is an amenable number.

1397556 is an abundant number, since it is smaller than the sum of its proper divisors (2135246).

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

1397556 is a wasteful number, since it uses less digits than its factorization.

1397556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38831 (or 38826 counting only the distinct ones).

The product of its digits is 28350, while the sum is 36.

The square root of 1397556 is about 1182.1827269927. The cubic root of 1397556 is about 111.8037592488.

It can be divided in two parts, 1397 and 556, that added together give a triangular number (1953 = T₆₂).

The spelling of 1397556 in words is "one million, three hundred ninety-seven thousand, five hundred fifty-six".