1240073981 has 8 divisors (see below), whose sum is σ = 1289713920. Its totient is φ = 1191282768.

The previous prime is 1240073971. The next prime is 1240073983. The reversal of 1240073981 is 1893700421.

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 1240073981 - 2⁶ = 1240073917 is a prime.

It is a super-2 number, since 2×1240073981² = 3075566956706376722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240073983) 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 7 ways as a sum of consecutive naturals, for example, 209201 + ... + 215046.

It is an arithmetic number, because the mean of its divisors is an integer number (161214240).

Almost surely, 2^1240073981 is an apocalyptic number.

It is an amenable number.

1240073981 is a deficient number, since it is larger than the sum of its proper divisors (49639939).

1240073981 is an equidigital number, since it uses as much as digits as its factorization.

1240073981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424363.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1240073981 is about 35214.6841672618. The cubic root of 1240073981 is about 1074.3584362982.

The spelling of 1240073981 in words is "one billion, two hundred forty million, seventy-three thousand, nine hundred eighty-one".