1231301525 has 12 divisors (see below), whose sum is σ = 1548320544. Its totient is φ = 971166000.

The previous prime is 1231301507. The next prime is 1231301543. The reversal of 1231301525 is 5251031321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1231301507) and next prime (1231301543).

It is not a de Polignac number, because 1231301525 - 2¹² = 1231297429 is a prime.

It is a super-2 number, since 2×1231301525² = 3032206890934651250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231301525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345071 + ... + 348620.

It is an arithmetic number, because the mean of its divisors is an integer number (129026712).

Almost surely, 2^1231301525 is an apocalyptic number.

It is an amenable number.

1231301525 is a deficient number, since it is larger than the sum of its proper divisors (317019019).

1231301525 is an equidigital number, since it uses as much as digits as its factorization.

1231301525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693772 (or 693767 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1231301525 is about 35089.9063122146. The cubic root of 1231301525 is about 1071.8190518103.

Adding to 1231301525 its reverse (5251031321), we get a palindrome (6482332846).

The spelling of 1231301525 in words is "one billion, two hundred thirty-one million, three hundred one thousand, five hundred twenty-five".