1242200661 has 16 divisors (see below), whose sum is σ = 1806255360. Its totient is φ = 754752960.

The previous prime is 1242200651. The next prime is 1242200699. The reversal of 1242200661 is 1660022421.

It is not a de Polignac number, because 1242200661 - 2¹⁵ = 1242167893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242200611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198510 + ... + 204671.

It is an arithmetic number, because the mean of its divisors is an integer number (112890960).

Almost surely, 2^1242200661 is an apocalyptic number.

It is an amenable number.

1242200661 is a deficient number, since it is larger than the sum of its proper divisors (564054699).

1242200661 is a wasteful number, since it uses less digits than its factorization.

1242200661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403276.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1242200661 is about 35244.8671582118. The cubic root of 1242200661 is about 1074.9722469129.

The spelling of 1242200661 in words is "one billion, two hundred forty-two million, two hundred thousand, six hundred sixty-one".