1231055125 has 24 divisors (see below), whose sum is σ = 1621532952. Its totient is φ = 932976000.

The previous prime is 1231055123. The next prime is 1231055131. The reversal of 1231055125 is 5215501321.

It can be written as a sum of positive squares in 4 ways, for example, as 6195121 + 1224860004 = 2489^2 + 34998^2 .

It is not a de Polignac number, because 1231055125 - 2¹ = 1231055123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 1231055125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231055123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31485 + ... + 58765.

It is an arithmetic number, because the mean of its divisors is an integer number (67563873).

Almost surely, 2^1231055125 is an apocalyptic number.

It is an amenable number.

1231055125 is a deficient number, since it is larger than the sum of its proper divisors (390477827).

1231055125 is an equidigital number, since it uses as much as digits as its factorization.

1231055125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27334 (or 27305 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1231055125 is about 35086.3951553875. The cubic root of 1231055125 is about 1071.7475519036.

Adding to 1231055125 its reverse (5215501321), we get a palindrome (6446556446).

The spelling of 1231055125 in words is "one billion, two hundred thirty-one million, fifty-five thousand, one hundred twenty-five".