971281645 has 8 divisors (see below), whose sum is σ = 1167695640. Its totient is φ = 775586880.

The previous prime is 971281643. The next prime is 971281667. The reversal of 971281645 is 546182179.

It can be written as a sum of positive squares in 4 ways, for example, as 7986276 + 963295369 = 2826^2 + 31037^2 .

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

It is not a de Polignac number, because 971281645 - 2¹ = 971281643 is a prime.

It is a super-3 number, since 3×971281645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971281643) 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, 176830 + ... + 182239.

It is an arithmetic number, because the mean of its divisors is an integer number (145961955).

Almost surely, 2^971281645 is an apocalyptic number.

It is an amenable number.

971281645 is a deficient number, since it is larger than the sum of its proper divisors (196413995).

971281645 is a wasteful number, since it uses less digits than its factorization.

971281645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359615.

The product of its digits is 120960, while the sum is 43.

The square root of 971281645 is about 31165.3917831944. The cubic root of 971281645 is about 990.3340861376.

The spelling of 971281645 in words is "nine hundred seventy-one million, two hundred eighty-one thousand, six hundred forty-five".