1225490049 has 27 divisors (see below), whose sum is σ = 2060392737. Its totient is φ = 699859944.

The previous prime is 1225490029. The next prime is 1225490051. The reversal of 1225490049 is 9400945221.

The square root of 1225490049 is 35007.

It is a perfect power (a square), and thus also a powerful number.

1225490049 is a `hidden beast` number, since 122 + 5 + 490 + 0 + 49 = 666.

It is not a de Polignac number, because 1225490049 - 2⁵ = 1225490017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1225489995 and 1225490022.

It is not an unprimeable number, because it can be changed into a prime (1225490029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 734314 + ... + 735980.

Almost surely, 2^1225490049 is an apocalyptic number.

1225490049 is the 35007-th square number.

1225490049 is the 17504-th centered octagonal number.

It is an amenable number.

1225490049 is a deficient number, since it is larger than the sum of its proper divisors (834902688).

1225490049 is an frugal number, since it uses more digits than its factorization.

1225490049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354 (or 1677 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The cubic root of 1225490049 is about 1070.1301408074.

Multiplying 1225490049 by its sum of digits (36), we get a square (44117641764 = 210042²).

The spelling of 1225490049 in words is "one billion, two hundred twenty-five million, four hundred ninety thousand, forty-nine".