11531025 has 48 divisors (see below), whose sum is σ = 23123520. Its totient is φ = 5587200.

The previous prime is 11531021. The next prime is 11531029. The reversal of 11531025 is 52013511.

It is an interprime number because it is at equal distance from previous prime (11531021) and next prime (11531029).

It is not a de Polignac number, because 11531025 - 2² = 11531021 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11530989 and 11531007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6649 + ... + 8201.

It is an arithmetic number, because the mean of its divisors is an integer number (481740).

Almost surely, 2^11531025 is an apocalyptic number.

11531025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11531025 is an abundant number, since it is smaller than the sum of its proper divisors (11592495).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11531025 is a wasteful number, since it uses less digits than its factorization.

11531025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 11531025 is about 3395.7362971821. The cubic root of 11531025 is about 225.9206720305.

Adding to 11531025 its reverse (52013511), we get a palindrome (63544536).

The spelling of 11531025 in words is "eleven million, five hundred thirty-one thousand, twenty-five".