1242152390 has 8 divisors (see below), whose sum is σ = 2235874320. Its totient is φ = 496860952.

The previous prime is 1242152383. The next prime is 1242152449. The reversal of 1242152390 is 932512421.

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

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, 62107610 + ... + 62107629.

It is an arithmetic number, because the mean of its divisors is an integer number (279484290).

Almost surely, 2^1242152390 is an apocalyptic number.

1242152390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242152390 is a deficient number, since it is larger than the sum of its proper divisors (993721930).

1242152390 is a wasteful number, since it uses less digits than its factorization.

1242152390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124215246.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1242152390 is about 35244.1823568089. The cubic root of 1242152390 is about 1074.9583225234.

The spelling of 1242152390 in words is "one billion, two hundred forty-two million, one hundred fifty-two thousand, three hundred ninety".