1274638 has 4 divisors (see below), whose sum is σ = 1911960. Its totient is φ = 637318.

The previous prime is 1274633. The next prime is 1274671. The reversal of 1274638 is 8364721.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1274633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318658 + ... + 318661.

It is an arithmetic number, because the mean of its divisors is an integer number (477990).

2^1274638 is an apocalyptic number.

1274638 is a deficient number, since it is larger than the sum of its proper divisors (637322).

1274638 is an equidigital number, since it uses as much as digits as its factorization.

1274638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637321.

The product of its digits is 8064, while the sum is 31.

The square root of 1274638 is about 1128.9986713898. The cubic root of 1274638 is about 108.4248809324.

The spelling of 1274638 in words is "one million, two hundred seventy-four thousand, six hundred thirty-eight".