1242397615 has 4 divisors (see below), whose sum is σ = 1490877144. Its totient is φ = 993918088.

The previous prime is 1242397591. The next prime is 1242397679. The reversal of 1242397615 is 5167932421.

It is a happy number.

1242397615 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1242397615 - 2⁹ = 1242397103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124239757 + ... + 124239766.

It is an arithmetic number, because the mean of its divisors is an integer number (372719286).

Almost surely, 2^1242397615 is an apocalyptic number.

1242397615 is a deficient number, since it is larger than the sum of its proper divisors (248479529).

1242397615 is an equidigital number, since it uses as much as digits as its factorization.

1242397615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248479528.

The product of its digits is 90720, while the sum is 40.

The square root of 1242397615 is about 35247.6611280805. The cubic root of 1242397615 is about 1075.0290570837.

The spelling of 1242397615 in words is "one billion, two hundred forty-two million, three hundred ninety-seven thousand, six hundred fifteen".