981212745 has 16 divisors (see below), whose sum is σ = 1574963712. Its totient is φ = 521639040.

The previous prime is 981212719. The next prime is 981212753. The reversal of 981212745 is 547212189.

It is not a de Polignac number, because 981212745 - 2⁸ = 981212489 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99801 + ... + 109190.

It is an arithmetic number, because the mean of its divisors is an integer number (98435232).

Almost surely, 2^981212745 is an apocalyptic number.

It is an amenable number.

981212745 is a deficient number, since it is larger than the sum of its proper divisors (593750967).

981212745 is a wasteful number, since it uses less digits than its factorization.

981212745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209312.

The product of its digits is 40320, while the sum is 39.

The square root of 981212745 is about 31324.3155551722. The cubic root of 981212745 is about 993.6979492535.

The spelling of 981212745 in words is "nine hundred eighty-one million, two hundred twelve thousand, seven hundred forty-five".