1242191141 has 16 divisors (see below), whose sum is σ = 1283515200. Its totient is φ = 1201765248.

The previous prime is 1242191113. The next prime is 1242191143. The reversal of 1242191141 is 1411912421.

It is a cyclic number.

It is not a de Polignac number, because 1242191141 - 2¹⁴ = 1242174757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1242191141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242191143) 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, 850670 + ... + 852128.

It is an arithmetic number, because the mean of its divisors is an integer number (80219700).

Almost surely, 2^1242191141 is an apocalyptic number.

It is an amenable number.

1242191141 is a deficient number, since it is larger than the sum of its proper divisors (41324059).

1242191141 is a wasteful number, since it uses less digits than its factorization.

1242191141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748.

The product of its digits is 576, while the sum is 26.

The square root of 1242191141 is about 35244.7321028264. The cubic root of 1242191141 is about 1074.9695007752.

The spelling of 1242191141 in words is "one billion, two hundred forty-two million, one hundred ninety-one thousand, one hundred forty-one".