1242351403 has 4 divisors (see below), whose sum is σ = 1243485000. Its totient is φ = 1241217808.

The previous prime is 1242351401. The next prime is 1242351419. The reversal of 1242351403 is 3041532421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3041532421 = 15331 ⋅198391.

It is a cyclic number.

It is not a de Polignac number, because 1242351403 - 2¹ = 1242351401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242351401) 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, 565153 + ... + 567346.

It is an arithmetic number, because the mean of its divisors is an integer number (310871250).

Almost surely, 2^1242351403 is an apocalyptic number.

1242351403 is a deficient number, since it is larger than the sum of its proper divisors (1133597).

1242351403 is a wasteful number, since it uses less digits than its factorization.

1242351403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133596.

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

The square root of 1242351403 is about 35247.0055891277. The cubic root of 1242351403 is about 1075.0157280554.

Adding to 1242351403 its reverse (3041532421), we get a palindrome (4283883824).

The spelling of 1242351403 in words is "one billion, two hundred forty-two million, three hundred fifty-one thousand, four hundred three".