1225023523 has 4 divisors (see below), whose sum is σ = 1226177008. Its totient is φ = 1223870040.

The previous prime is 1225023521. The next prime is 1225023571. The reversal of 1225023523 is 3253205221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1225023523 - 2¹ = 1225023521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225023521) 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, 575148 + ... + 577273.

It is an arithmetic number, because the mean of its divisors is an integer number (306544252).

Almost surely, 2^1225023523 is an apocalyptic number.

1225023523 is a deficient number, since it is larger than the sum of its proper divisors (1153485).

1225023523 is a wasteful number, since it uses less digits than its factorization.

1225023523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153484.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 1225023523 is about 35000.3360412439. The cubic root of 1225023523 is about 1069.9943293146.

Adding to 1225023523 its reverse (3253205221), we get a palindrome (4478228744).

It can be divided in two parts, 122502 and 3523, that added together give a square (126025 = 355²).

The spelling of 1225023523 in words is "one billion, two hundred twenty-five million, twenty-three thousand, five hundred twenty-three".