1010000025 has 36 divisors (see below), whose sum is σ = 1830851568. Its totient is φ = 532166880.

The previous prime is 1010000021. The next prime is 1010000029. The reversal of 1010000025 is 5200000101.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1010000021) and next prime (1010000029).

It is not a de Polignac number, because 1010000025 - 2² = 1010000021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1009999971 and 1010000016.

It is not an unprimeable number, because it can be changed into a prime (1010000021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8367 + ... + 45716.

It is an arithmetic number, because the mean of its divisors is an integer number (50856988).

Almost surely, 2^1010000025 is an apocalyptic number.

1010000025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1010000025 is a deficient number, since it is larger than the sum of its proper divisors (820851543).

1010000025 is a wasteful number, since it uses less digits than its factorization.

1010000025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54182 (or 54174 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 1010000025 is about 31780.4975574644. The cubic root of 1010000025 is about 1003.3222918203.

Adding to 1010000025 its reverse (5200000101), we get a palindrome (6210000126).

The spelling of 1010000025 in words is "one billion, ten million, twenty-five", and thus it is an aban number and an uban number.