247775025 has 12 divisors (see below), whose sum is σ = 409654832. Its totient is φ = 132146640.

The previous prime is 247775009. The next prime is 247775027. The reversal of 247775025 is 520577742.

It is not a de Polignac number, because 247775025 - 2⁴ = 247775009 is a prime.

It is a super-2 number, since 2×247775025² = 122784926027501250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247775027) 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, 1651759 + ... + 1651908.

Almost surely, 2^247775025 is an apocalyptic number.

247775025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

247775025 is a deficient number, since it is larger than the sum of its proper divisors (161879807).

247775025 is a wasteful number, since it uses less digits than its factorization.

247775025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303680 (or 3303675 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 39.

The square root of 247775025 is about 15740.8711639477. The cubic root of 247775025 is about 628.0860912509.

The spelling of 247775025 in words is "two hundred forty-seven million, seven hundred seventy-five thousand, twenty-five".