1225129574 has 4 divisors (see below), whose sum is σ = 1837694364. Its totient is φ = 612564786.

The previous prime is 1225129573. The next prime is 1225129613. The reversal of 1225129574 is 4759215221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225129571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306282392 + ... + 306282395.

It is an arithmetic number, because the mean of its divisors is an integer number (459423591).

Almost surely, 2^1225129574 is an apocalyptic number.

1225129574 is a deficient number, since it is larger than the sum of its proper divisors (612564790).

1225129574 is an equidigital number, since it uses as much as digits as its factorization.

1225129574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612564789.

The product of its digits is 50400, while the sum is 38.

The square root of 1225129574 is about 35001.8510081967. The cubic root of 1225129574 is about 1070.0252051011.

The spelling of 1225129574 in words is "one billion, two hundred twenty-five million, one hundred twenty-nine thousand, five hundred seventy-four".