101440025 has 6 divisors (see below), whose sum is σ = 125785662. Its totient is φ = 81152000.

The previous prime is 101440021. The next prime is 101440049. The reversal of 101440025 is 520044101.

It can be written as a sum of positive squares in 3 ways, for example, as 13980121 + 87459904 = 3739^2 + 9352^2 .

It is not a de Polignac number, because 101440025 - 2² = 101440021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101439985 and 101440012.

It is not an unprimeable number, because it can be changed into a prime (101440021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2028776 + ... + 2028825.

It is an arithmetic number, because the mean of its divisors is an integer number (20964277).

Almost surely, 2^101440025 is an apocalyptic number.

It is an amenable number.

101440025 is a deficient number, since it is larger than the sum of its proper divisors (24345637).

101440025 is an equidigital number, since it uses as much as digits as its factorization.

101440025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057611 (or 4057606 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 101440025 is about 10071.7438907073. The cubic root of 101440025 is about 466.3762748347.

Adding to 101440025 its reverse (520044101), we get a palindrome (621484126).

The spelling of 101440025 in words is "one hundred one million, four hundred forty thousand, twenty-five".