1242561103 has 8 divisors (see below), whose sum is σ = 1424141600. Its totient is φ = 1061998560.

The previous prime is 1242561101. The next prime is 1242561109. The reversal of 1242561103 is 3011652421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1242561103 - 2¹ = 1242561101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242561101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251868 + ... + 256753.

It is an arithmetic number, because the mean of its divisors is an integer number (178017700).

Almost surely, 2^1242561103 is an apocalyptic number.

1242561103 is a deficient number, since it is larger than the sum of its proper divisors (181580497).

1242561103 is an equidigital number, since it uses as much as digits as its factorization.

1242561103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508977.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1242561103 is about 35249.9801843916. The cubic root of 1242561103 is about 1075.0762096323.

The spelling of 1242561103 in words is "one billion, two hundred forty-two million, five hundred sixty-one thousand, one hundred three".