247890025 has 12 divisors (see below), whose sum is σ = 308950092. Its totient is φ = 197301440.

The previous prime is 247890001. The next prime is 247890029. The reversal of 247890025 is 520098742.

It can be written as a sum of positive squares in 6 ways, for example, as 26594649 + 221295376 = 5157^2 + 14876^2 .

It is not a de Polignac number, because 247890025 - 2²⁵ = 214335593 is a prime.

It is a super-2 number, since 2×247890025² = 122898928989001250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247890029) 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, 20242 + ... + 30091.

It is an arithmetic number, because the mean of its divisors is an integer number (25745841).

Almost surely, 2^247890025 is an apocalyptic number.

247890025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

247890025 is a deficient number, since it is larger than the sum of its proper divisors (61060067).

247890025 is a wasteful number, since it uses less digits than its factorization.

247890025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50540 (or 50535 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 247890025 is about 15744.5236510985. The cubic root of 247890025 is about 628.1832475707.

The spelling of 247890025 in words is "two hundred forty-seven million, eight hundred ninety thousand, twenty-five".