1252123305 has 8 divisors (see below), whose sum is σ = 2003397312. Its totient is φ = 667799088.

The previous prime is 1252123303. The next prime is 1252123319. The reversal of 1252123305 is 5033212521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1252123305 - 2¹ = 1252123303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1252123303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41737429 + ... + 41737458.

It is an arithmetic number, because the mean of its divisors is an integer number (250424664).

Almost surely, 2^1252123305 is an apocalyptic number.

1252123305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1252123305 is a deficient number, since it is larger than the sum of its proper divisors (751274007).

1252123305 is an equidigital number, since it uses as much as digits as its factorization.

1252123305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83474895.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1252123305 is about 35385.3543856777. The cubic root of 1252123305 is about 1077.8269362466.

Adding to 1252123305 its reverse (5033212521), we get a palindrome (6285335826).

The spelling of 1252123305 in words is "one billion, two hundred fifty-two million, one hundred twenty-three thousand, three hundred five".