1240525123 has 4 divisors (see below), whose sum is σ = 1244908888. Its totient is φ = 1236141360.

The previous prime is 1240525093. The next prime is 1240525133. The reversal of 1240525123 is 3215250421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3215250421 = 5153 ⋅623957.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240525123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240525133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2191458 + ... + 2192023.

It is an arithmetic number, because the mean of its divisors is an integer number (311227222).

Almost surely, 2^1240525123 is an apocalyptic number.

1240525123 is a deficient number, since it is larger than the sum of its proper divisors (4383765).

1240525123 is an equidigital number, since it uses as much as digits as its factorization.

1240525123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4383764.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1240525123 is about 35221.0891796378. The cubic root of 1240525123 is about 1074.4887052596.

Adding to 1240525123 its reverse (3215250421), we get a palindrome (4455775544).

The spelling of 1240525123 in words is "one billion, two hundred forty million, five hundred twenty-five thousand, one hundred twenty-three".