1225437271 has 4 divisors (see below), whose sum is σ = 1227874032. Its totient is φ = 1223000512.

The previous prime is 1225437193. The next prime is 1225437277. The reversal of 1225437271 is 1727345221.

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 1225437271 - 2¹⁵ = 1225404503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225437277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1217626 + ... + 1218631.

It is an arithmetic number, because the mean of its divisors is an integer number (306968508).

Almost surely, 2^1225437271 is an apocalyptic number.

1225437271 is a deficient number, since it is larger than the sum of its proper divisors (2436761).

1225437271 is an equidigital number, since it uses as much as digits as its factorization.

1225437271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436760.

The product of its digits is 23520, while the sum is 34.

The square root of 1225437271 is about 35006.2461712192. The cubic root of 1225437271 is about 1070.1147782077.

The spelling of 1225437271 in words is "one billion, two hundred twenty-five million, four hundred thirty-seven thousand, two hundred seventy-one".