1241987331 has 8 divisors (see below), whose sum is σ = 1783366480. Its totient is φ = 764299872.

The previous prime is 1241987291. The next prime is 1241987333. The reversal of 1241987331 is 1337891421.

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

It is not a de Polignac number, because 1241987331 - 2⁹ = 1241986819 is a prime.

It is a super-2 number, since 2×1241987331² = 3085065060729007122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 31845829 = 1241987331 / (1 + 2 + 4 + 1 + 9 + 8 + 7 + 3 + 3 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1241987331.

It is not an unprimeable number, because it can be changed into a prime (1241987333) 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, 15922876 + ... + 15922953.

It is an arithmetic number, because the mean of its divisors is an integer number (222920810).

Almost surely, 2^1241987331 is an apocalyptic number.

1241987331 is a deficient number, since it is larger than the sum of its proper divisors (541379149).

1241987331 is a wasteful number, since it uses less digits than its factorization.

1241987331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31845845.

The product of its digits is 36288, while the sum is 39.

The square root of 1241987331 is about 35241.8406301374. The cubic root of 1241987331 is about 1074.9107064104.

The spelling of 1241987331 in words is "one billion, two hundred forty-one million, nine hundred eighty-seven thousand, three hundred thirty-one".