1408642 has 4 divisors (see below), whose sum is σ = 2112966. Its totient is φ = 704320.

The previous prime is 1408633. The next prime is 1408651. The reversal of 1408642 is 2468041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2468041 = 1571².

It is an interprime number because it is at equal distance from previous prime (1408633) and next prime (1408651).

It can be written as a sum of positive squares in only one way, i.e., 737881 + 670761 = 859^2 + 819^2 .

It is an unprimeable number.

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, 352159 + ... + 352162.

2^1408642 is an apocalyptic number.

1408642 is a deficient number, since it is larger than the sum of its proper divisors (704324).

1408642 is an equidigital number, since it uses as much as digits as its factorization.

1408642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704323.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1408642 is about 1186.8622497999. The cubic root of 1408642 is about 112.0986057632.

The spelling of 1408642 in words is "one million, four hundred eight thousand, six hundred forty-two".