1242103005 has 112 divisors (see below), whose sum is σ = 2626557696. Its totient is φ = 555672960.

The previous prime is 1242103003. The next prime is 1242103007. The reversal of 1242103005 is 5003012421.

It is an interprime number because it is at equal distance from previous prime (1242103003) and next prime (1242103007).

It is not a de Polignac number, because 1242103005 - 2¹ = 1242103003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242103001) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 520044 + ... + 522426.

It is an arithmetic number, because the mean of its divisors is an integer number (23451408).

Almost surely, 2^1242103005 is an apocalyptic number.

1242103005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242103005 is an abundant number, since it is smaller than the sum of its proper divisors (1384454691).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242103005 is a wasteful number, since it uses less digits than its factorization.

1242103005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430 (or 2415 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1242103005 is about 35243.4817377625. The cubic root of 1242103005 is about 1074.9440764130.

Adding to 1242103005 its reverse (5003012421), we get a palindrome (6245115426).

The spelling of 1242103005 in words is "one billion, two hundred forty-two million, one hundred three thousand, five".