1242945396 has 108 divisors (see below), whose sum is σ = 3946933536. Its totient is φ = 322835040.

The previous prime is 1242945373. The next prime is 1242945397. The reversal of 1242945396 is 6935492421.

1242945396 is a `hidden beast` number, since 1 + 24 + 2 + 94 + 539 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242945397) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10111 + ... + 50873.

Almost surely, 2^1242945396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242945396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1973466768).

1242945396 is an abundant number, since it is smaller than the sum of its proper divisors (2703988140).

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

1242945396 is a wasteful number, since it uses less digits than its factorization.

1242945396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40802 (or 40786 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 1242945396 is about 35255.4307305981. The cubic root of 1242945396 is about 1075.1870295822.

The spelling of 1242945396 in words is "one billion, two hundred forty-two million, nine hundred forty-five thousand, three hundred ninety-six".