1242454 has 4 divisors (see below), whose sum is σ = 1863684. Its totient is φ = 621226.

The previous prime is 1242421. The next prime is 1242457. The reversal of 1242454 is 4542421.

It is a happy number.

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

It is a Smith number, since the sum of its digits (22) 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 (1242457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310612 + ... + 310615.

It is an arithmetic number, because the mean of its divisors is an integer number (465921).

2^1242454 is an apocalyptic number.

1242454 is a deficient number, since it is larger than the sum of its proper divisors (621230).

1242454 is an equidigital number, since it uses as much as digits as its factorization.

1242454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621229.

The product of its digits is 1280, while the sum is 22.

The square root of 1242454 is about 1114.6542064694. The cubic root of 1242454 is about 107.5045319885.

Adding to 1242454 its reverse (4542421), we get a palindrome (5784875).

The spelling of 1242454 in words is "one million, two hundred forty-two thousand, four hundred fifty-four".