1238656 has 16 divisors (see below), whose sum is σ = 2467890. Its totient is φ = 619264.

The previous prime is 1238647. The next prime is 1238659. The reversal of 1238656 is 6568321.

It can be written as a sum of positive squares in only one way, i.e., 968256 + 270400 = 984^2 + 520^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1238659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4711 + ... + 4966.

2^1238656 is an apocalyptic number.

1238656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1238656 is a deficient number, since it is larger than the sum of its proper divisors (1229234).

1238656 is an frugal number, since it uses more digits than its factorization.

1238656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9691 (or 9679 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 1238656 is about 1112.9492351406. The cubic root of 1238656 is about 107.3948783084.

The spelling of 1238656 in words is "one million, two hundred thirty-eight thousand, six hundred fifty-six".