1242495823 has 8 divisors (see below), whose sum is σ = 1310630400. Its totient is φ = 1174635288.

The previous prime is 1242495817. The next prime is 1242495827. The reversal of 1242495823 is 3285942421.

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 1242495823 - 2⁵ = 1242495791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242495827) 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, 59161 + ... + 77362.

It is an arithmetic number, because the mean of its divisors is an integer number (163828800).

Almost surely, 2^1242495823 is an apocalyptic number.

1242495823 is a deficient number, since it is larger than the sum of its proper divisors (68134577).

1242495823 is a wasteful number, since it uses less digits than its factorization.

1242495823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137021.

The product of its digits is 138240, while the sum is 40.

The square root of 1242495823 is about 35249.0542142623. The cubic root of 1242495823 is about 1075.0573823345.

The spelling of 1242495823 in words is "one billion, two hundred forty-two million, four hundred ninety-five thousand, eight hundred twenty-three".