1203957981 has 12 divisors (see below), whose sum is σ = 1745666208. Its totient is φ = 799585224.

The previous prime is 1203957949. The next prime is 1203958001. The reversal of 1203957981 is 1897593021.

It is not a de Polignac number, because 1203957981 - 2⁵ = 1203957949 is a prime.

It is a super-2 number, since 2×1203957981² = 2899029640027192722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203957581) 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 11 ways as a sum of consecutive naturals, for example, 251955 + ... + 256688.

It is an arithmetic number, because the mean of its divisors is an integer number (145472184).

Almost surely, 2^1203957981 is an apocalyptic number.

It is an amenable number.

1203957981 is a deficient number, since it is larger than the sum of its proper divisors (541708227).

1203957981 is a wasteful number, since it uses less digits than its factorization.

1203957981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508912 (or 508909 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 1203957981 is about 34698.0976567880. The cubic root of 1203957981 is about 1063.8256154769.

The spelling of 1203957981 in words is "one billion, two hundred three million, nine hundred fifty-seven thousand, nine hundred eighty-one".