242071691 has 4 divisors (see below), whose sum is σ = 242927352. Its totient is φ = 241216032.

The previous prime is 242071673. The next prime is 242071693. The reversal of 242071691 is 196170242.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242071691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242071693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427406 + ... + 427971.

It is an arithmetic number, because the mean of its divisors is an integer number (60731838).

Almost surely, 2^242071691 is an apocalyptic number.

242071691 is a deficient number, since it is larger than the sum of its proper divisors (855661).

242071691 is an equidigital number, since it uses as much as digits as its factorization.

242071691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855660.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 242071691 is about 15558.6532514868. The cubic root of 242071691 is about 623.2294989107.

The spelling of 242071691 in words is "two hundred forty-two million, seventy-one thousand, six hundred ninety-one".