1242553406 has 4 divisors (see below), whose sum is σ = 1863830112. Its totient is φ = 621276702.

The previous prime is 1242553397. The next prime is 1242553427. The reversal of 1242553406 is 6043552421.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310638350 + ... + 310638353.

It is an arithmetic number, because the mean of its divisors is an integer number (465957528).

Almost surely, 2^1242553406 is an apocalyptic number.

1242553406 is a deficient number, since it is larger than the sum of its proper divisors (621276706).

1242553406 is an equidigital number, since it uses as much as digits as its factorization.

1242553406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621276705.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1242553406 is about 35249.8710068562. The cubic root of 1242553406 is about 1075.0739897875.

The spelling of 1242553406 in words is "one billion, two hundred forty-two million, five hundred fifty-three thousand, four hundred six".