1450917981 has 16 divisors (see below), whose sum is σ = 2154630720. Its totient is φ = 964973520.

The previous prime is 1450917899. The next prime is 1450917991. The reversal of 1450917981 is 1897190541.

It is a happy number.

It is not a de Polignac number, because 1450917981 - 2¹⁸ = 1450655837 is a prime.

It is a super-2 number, since 2×1450917981² = 4210325975178232722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1450917991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52455 + ... + 75188.

It is an arithmetic number, because the mean of its divisors is an integer number (134664420).

Almost surely, 2^1450917981 is an apocalyptic number.

It is an amenable number.

1450917981 is a deficient number, since it is larger than the sum of its proper divisors (703712739).

1450917981 is a wasteful number, since it uses less digits than its factorization.

1450917981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128073 (or 128067 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 45.

The square root of 1450917981 is about 38090.9173032102. The cubic root of 1450917981 is about 1132.0900002631.

The spelling of 1450917981 in words is "one billion, four hundred fifty million, nine hundred seventeen thousand, nine hundred eighty-one".