1340642 has 4 divisors (see below), whose sum is σ = 2010966. Its totient is φ = 670320.

The previous prime is 1340639. The next prime is 1340653. The reversal of 1340642 is 2460431.

It is a happy number.

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., 1079521 + 261121 = 1039^2 + 511^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335159 + ... + 335162.

2^1340642 is an apocalyptic number.

1340642 is a deficient number, since it is larger than the sum of its proper divisors (670324).

1340642 is an equidigital number, since it uses as much as digits as its factorization.

1340642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670323.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1340642 is about 1157.8609588375. The cubic root of 1340642 is about 110.2649810046.

The spelling of 1340642 in words is "one million, three hundred forty thousand, six hundred forty-two".