1264642 has 4 divisors (see below), whose sum is σ = 1896966. Its totient is φ = 632320.

The previous prime is 1264607. The next prime is 1264643. The reversal of 1264642 is 2464621.

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

It can be written as a sum of positive squares in only one way, i.e., 1212201 + 52441 = 1101^2 + 229^2 .

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (1264643) 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, 316159 + ... + 316162.

2^1264642 is an apocalyptic number.

1264642 is a deficient number, since it is larger than the sum of its proper divisors (632324).

1264642 is an equidigital number, since it uses as much as digits as its factorization.

1264642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632323.

The product of its digits is 2304, while the sum is 25.

The square root of 1264642 is about 1124.5630262462. The cubic root of 1264642 is about 108.1407059502.

The spelling of 1264642 in words is "one million, two hundred sixty-four thousand, six hundred forty-two".