1225437329 has 4 divisors (see below), whose sum is σ = 1233552960. Its totient is φ = 1217321700.

The previous prime is 1225437307. The next prime is 1225437341. The reversal of 1225437329 is 9237345221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9237345221 = 13 ⋅710565017.

It is a cyclic number.

It is not a de Polignac number, because 1225437329 - 2¹⁶ = 1225371793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1225437292 and 1225437301.

It is not an unprimeable number, because it can be changed into a prime (1225437359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4057589 + ... + 4057890.

It is an arithmetic number, because the mean of its divisors is an integer number (308388240).

Almost surely, 2^1225437329 is an apocalyptic number.

It is an amenable number.

1225437329 is a deficient number, since it is larger than the sum of its proper divisors (8115631).

1225437329 is an equidigital number, since it uses as much as digits as its factorization.

1225437329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8115630.

The product of its digits is 90720, while the sum is 38.

The square root of 1225437329 is about 35006.2469996428. The cubic root of 1225437329 is about 1070.1147950905.

The spelling of 1225437329 in words is "one billion, two hundred twenty-five million, four hundred thirty-seven thousand, three hundred twenty-nine".