1241781931 has 8 divisors (see below), whose sum is σ = 1338158304. Its totient is φ = 1145527680.

The previous prime is 1241781929. The next prime is 1241781979. The reversal of 1241781931 is 1391871421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1241781931 - 2¹ = 1241781929 is a prime.

It is a super-2 number, since 2×1241781931² = 3084044728316177522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1241781991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8830 + ... + 50611.

It is an arithmetic number, because the mean of its divisors is an integer number (167269788).

Almost surely, 2^1241781931 is an apocalyptic number.

1241781931 is a deficient number, since it is larger than the sum of its proper divisors (96376373).

1241781931 is a wasteful number, since it uses less digits than its factorization.

1241781931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61061.

The product of its digits is 12096, while the sum is 37.

The square root of 1241781931 is about 35238.9263599219. The cubic root of 1241781931 is about 1074.8514468603.

The spelling of 1241781931 in words is "one billion, two hundred forty-one million, seven hundred eighty-one thousand, nine hundred thirty-one".