1974656 has 16 divisors (see below), whose sum is σ = 3934140. Its totient is φ = 987264.

The previous prime is 1974649. The next prime is 1974659. The reversal of 1974656 is 6564791.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1974659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7586 + ... + 7841.

2^1974656 is an apocalyptic number.

1974656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1974656 is a deficient number, since it is larger than the sum of its proper divisors (1959484).

1974656 is an equidigital number, since it uses as much as digits as its factorization.

1974656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15441 (or 15429 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 1974656 is about 1405.2245372182. The cubic root of 1974656 is about 125.4576504040.

The spelling of 1974656 in words is "one million, nine hundred seventy-four thousand, six hundred fifty-six".