1227825491 has 12 divisors (see below), whose sum is σ = 1288770192. Its totient is φ = 1167536304.

The previous prime is 1227825481. The next prime is 1227825539. The reversal of 1227825491 is 1945287221.

It is not a de Polignac number, because 1227825491 - 2¹⁰ = 1227824467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1227825481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2796650 + ... + 2797088.

It is an arithmetic number, because the mean of its divisors is an integer number (107397516).

Almost surely, 2^1227825491 is an apocalyptic number.

1227825491 is a deficient number, since it is larger than the sum of its proper divisors (60944701).

1227825491 is an frugal number, since it uses more digits than its factorization.

1227825491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178 (or 739 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The square root of 1227825491 is about 35040.3409087298. The cubic root of 1227825491 is about 1070.8094992261.

The spelling of 1227825491 in words is "one billion, two hundred twenty-seven million, eight hundred twenty-five thousand, four hundred ninety-one".