1242452081 has 8 divisors (see below), whose sum is σ = 1339226280. Its totient is φ = 1145849472.

The previous prime is 1242452059. The next prime is 1242452137. The reversal of 1242452081 is 1802542421.

It can be written as a sum of positive squares in 4 ways, for example, as 130896481 + 1111555600 = 11441^2 + 33340^2 .

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 1242452081 - 2²² = 1238257777 is a prime.

It is a super-2 number, since 2×1242452081² = 3087374347162461122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242452051) 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, 27650 + ... + 57003.

It is an arithmetic number, because the mean of its divisors is an integer number (167403285).

Almost surely, 2^1242452081 is an apocalyptic number.

It is an amenable number.

1242452081 is a deficient number, since it is larger than the sum of its proper divisors (96774199).

1242452081 is a wasteful number, since it uses less digits than its factorization.

1242452081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85795.

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 1242452081 is about 35248.4337382528. The cubic root of 1242452081 is about 1075.0447664069.

The spelling of 1242452081 in words is "one billion, two hundred forty-two million, four hundred fifty-two thousand, eighty-one".