1242000403 has 6 divisors (see below), whose sum is σ = 1444776036. Its totient is φ = 1064571732.

The previous prime is 1242000401. The next prime is 1242000421. The reversal of 1242000403 is 3040002421.

It is not a de Polignac number, because 1242000403 - 2¹ = 1242000401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242000401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12673425 + ... + 12673522.

It is an arithmetic number, because the mean of its divisors is an integer number (240796006).

Almost surely, 2^1242000403 is an apocalyptic number.

1242000403 is a deficient number, since it is larger than the sum of its proper divisors (202775633).

1242000403 is an equidigital number, since it uses as much as digits as its factorization.

1242000403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25346961 (or 25346954 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1242000403 is about 35242.0260910181. The cubic root of 1242000403 is about 1074.9144775663.

Adding to 1242000403 its reverse (3040002421), we get a palindrome (4282002824).

The spelling of 1242000403 in words is "one billion, two hundred forty-two million, four hundred three", and thus it is an aban number.