1549942225 has 12 divisors (see below), whose sum is σ = 2069769436. Its totient is φ = 1144572480.

The previous prime is 1549942183. The next prime is 1549942231. The reversal of 1549942225 is 5222499451.

It can be written as a sum of positive squares in 6 ways, for example, as 482417296 + 1067524929 = 21964^2 + 32673^2 .

It is not a de Polignac number, because 1549942225 - 2⁹ = 1549941713 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2384202 + ... + 2384851.

Almost surely, 2^1549942225 is an apocalyptic number.

It is an amenable number.

1549942225 is a deficient number, since it is larger than the sum of its proper divisors (519827211).

1549942225 is a wasteful number, since it uses less digits than its factorization.

1549942225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4769076 (or 4769071 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

The square root of 1549942225 is about 39369.3056199878. The cubic root of 1549942225 is about 1157.2801480109.

The spelling of 1549942225 in words is "one billion, five hundred forty-nine million, nine hundred forty-two thousand, two hundred twenty-five".