1240402 has 4 divisors (see below), whose sum is σ = 1860606. Its totient is φ = 620200.

The previous prime is 1240399. The next prime is 1240423. The reversal of 1240402 is 2040421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2040421 = 179 ⋅11399.

It can be written as a sum of positive squares in only one way, i.e., 958441 + 281961 = 979^2 + 531^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 310099 + ... + 310102.

2^1240402 is an apocalyptic number.

1240402 is a deficient number, since it is larger than the sum of its proper divisors (620204).

1240402 is an equidigital number, since it uses as much as digits as its factorization.

1240402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620203.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 1240402 is about 1113.7333612674. The cubic root of 1240402 is about 107.4453156161.

Adding to 1240402 its reverse (2040421), we get a palindrome (3280823).

The spelling of 1240402 in words is "one million, two hundred forty thousand, four hundred two".