1242903407 has 4 divisors (see below), whose sum is σ = 1252690176. Its totient is φ = 1233116640.

The previous prime is 1242903401. The next prime is 1242903419. The reversal of 1242903407 is 7043092421.

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

It is a cyclic number.

It is not a de Polignac number, because 1242903407 - 2³⁰ = 169161583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242903401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4893194 + ... + 4893447.

It is an arithmetic number, because the mean of its divisors is an integer number (313172544).

Almost surely, 2^1242903407 is an apocalyptic number.

1242903407 is a deficient number, since it is larger than the sum of its proper divisors (9786769).

1242903407 is an equidigital number, since it uses as much as digits as its factorization.

1242903407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9786768.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1242903407 is about 35254.8352286605. The cubic root of 1242903407 is about 1075.1749221754.

Adding to 1242903407 its reverse (7043092421), we get a palindrome (8285995828).

The spelling of 1242903407 in words is "one billion, two hundred forty-two million, nine hundred three thousand, four hundred seven".