42971217025 has 27 divisors (see below), whose sum is σ = 58584247113. Its totient is φ = 31243502400.

The previous prime is 42971217017. The next prime is 42971217031. The reversal of 42971217025 is 52071217924.

The square root of 42971217025 is 207295.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1987643889 + 40983573136 = 44583^2 + 202444^2 .

It is not a de Polignac number, because 42971217025 - 2³ = 42971217017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11399341 + ... + 11403109.

Almost surely, 2^42971217025 is an apocalyptic number.

42971217025 is the 207295-th square number.

42971217025 is the 103648-th centered octagonal number.

It is an amenable number.

42971217025 is a deficient number, since it is larger than the sum of its proper divisors (15613030088).

42971217025 is an frugal number, since it uses more digits than its factorization.

42971217025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7570 (or 3785 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 42971217025 in words is "forty-two billion, nine hundred seventy-one million, two hundred seventeen thousand, twenty-five".