1971927025 has 12 divisors (see below), whose sum is σ = 2511276892. Its totient is φ = 1534904640.

The previous prime is 1971927017. The next prime is 1971927029. The reversal of 1971927025 is 5207291791.

1971927025 = T₇₂₁₄ + T₇₂₁₅ + ... + T₇₂₈₈.

It can be written as a sum of positive squares in 6 ways, for example, as 14837904 + 1957089121 = 3852^2 + 44239^2 .

It is not a de Polignac number, because 1971927025 - 2³ = 1971927017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1971927029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1064982 + ... + 1066831.

Almost surely, 2^1971927025 is an apocalyptic number.

It is an amenable number.

1971927025 is a deficient number, since it is larger than the sum of its proper divisors (539349867).

1971927025 is a wasteful number, since it uses less digits than its factorization.

1971927025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131860 (or 2131855 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 1971927025 is about 44406.3849575711. The cubic root of 1971927025 is about 1253.9982959345.

The spelling of 1971927025 in words is "one billion, nine hundred seventy-one million, nine hundred twenty-seven thousand, twenty-five".