1242896261 has 8 divisors (see below), whose sum is σ = 1253413824. Its totient is φ = 1232421120.

The previous prime is 1242896227. The next prime is 1242896273. The reversal of 1242896261 is 1626982421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242896261 is a prime.

It is a super-2 number, since 2×1242896261² = 3089582231215560242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242896201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49670 + ... + 70376.

It is an arithmetic number, because the mean of its divisors is an integer number (156676728).

Almost surely, 2^1242896261 is an apocalyptic number.

It is an amenable number.

1242896261 is a deficient number, since it is larger than the sum of its proper divisors (10517563).

1242896261 is a wasteful number, since it uses less digits than its factorization.

1242896261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21211.

The product of its digits is 82944, while the sum is 41.

The square root of 1242896261 is about 35254.7338807145. The cubic root of 1242896261 is about 1075.1728616198.

The spelling of 1242896261 in words is "one billion, two hundred forty-two million, eight hundred ninety-six thousand, two hundred sixty-one".