1242358271 has 32 divisors (see below), whose sum is σ = 1625702400. Its totient is φ = 920573280.

The previous prime is 1242358267. The next prime is 1242358291. The reversal of 1242358271 is 1728532421.

It is not a de Polignac number, because 1242358271 - 2² = 1242358267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242358211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315050 + ... + 318968.

It is an arithmetic number, because the mean of its divisors is an integer number (50803200).

Almost surely, 2^1242358271 is an apocalyptic number.

1242358271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1242358271 is a deficient number, since it is larger than the sum of its proper divisors (383344129).

1242358271 is a wasteful number, since it uses less digits than its factorization.

1242358271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139.

The product of its digits is 26880, while the sum is 35.

The square root of 1242358271 is about 35247.1030157090. The cubic root of 1242358271 is about 1075.0177090286.

The spelling of 1242358271 in words is "one billion, two hundred forty-two million, three hundred fifty-eight thousand, two hundred seventy-one".