1242862149 has 4 divisors (see below), whose sum is σ = 1657149536. Its totient is φ = 828574764.

The previous prime is 1242862139. The next prime is 1242862211. The reversal of 1242862149 is 9412682421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1242862149 - 2⁴ = 1242862133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242862139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207143689 + ... + 207143694.

It is an arithmetic number, because the mean of its divisors is an integer number (414287384).

Almost surely, 2^1242862149 is an apocalyptic number.

It is an amenable number.

1242862149 is a deficient number, since it is larger than the sum of its proper divisors (414287387).

1242862149 is an equidigital number, since it uses as much as digits as its factorization.

1242862149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414287386.

The product of its digits is 55296, while the sum is 39.

The square root of 1242862149 is about 35254.2500842097. The cubic root of 1242862149 is about 1075.1630252847.

The spelling of 1242862149 in words is "one billion, two hundred forty-two million, eight hundred sixty-two thousand, one hundred forty-nine".