1242552305 has 8 divisors (see below), whose sum is σ = 1492815912. Its totient is φ = 992873088.

The previous prime is 1242552293. The next prime is 1242552313. The reversal of 1242552305 is 5032552421.

It can be written as a sum of positive squares in 4 ways, for example, as 15241216 + 1227311089 = 3904^2 + 35033^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1242552305 - 2²² = 1238358001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141404 + ... + 149933.

It is an arithmetic number, because the mean of its divisors is an integer number (186601989).

Almost surely, 2^1242552305 is an apocalyptic number.

It is an amenable number.

1242552305 is a deficient number, since it is larger than the sum of its proper divisors (250263607).

1242552305 is an equidigital number, since it uses as much as digits as its factorization.

1242552305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292195.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 1242552305 is about 35249.8553897743. The cubic root of 1242552305 is about 1075.0736722540.

The spelling of 1242552305 in words is "one billion, two hundred forty-two million, five hundred fifty-two thousand, three hundred five".