1242513403 has 4 divisors (see below), whose sum is σ = 1257483528. Its totient is φ = 1227543280.

The previous prime is 1242513401. The next prime is 1242513443. The reversal of 1242513403 is 3043152421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3043152421 = 83 ⋅36664487.

It is a cyclic number.

It is not a de Polignac number, because 1242513403 - 2¹ = 1242513401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242513401) 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, 7484938 + ... + 7485103.

It is an arithmetic number, because the mean of its divisors is an integer number (314370882).

Almost surely, 2^1242513403 is an apocalyptic number.

1242513403 is a deficient number, since it is larger than the sum of its proper divisors (14970125).

1242513403 is an equidigital number, since it uses as much as digits as its factorization.

1242513403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14970124.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1242513403 is about 35249.3035817731. The cubic root of 1242513403 is about 1075.0624526183.

Adding to 1242513403 its reverse (3043152421), we get a palindrome (4285665824).

The spelling of 1242513403 in words is "one billion, two hundred forty-two million, five hundred thirteen thousand, four hundred three".