1425985449 has 16 divisors (see below), whose sum is σ = 2300750208. Its totient is φ = 766916352.

The previous prime is 1425985447. The next prime is 1425985489. The reversal of 1425985449 is 9445895241.

It is a happy number.

It is not a de Polignac number, because 1425985449 - 2¹ = 1425985447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1425985447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1996822 + ... + 1997535.

It is an arithmetic number, because the mean of its divisors is an integer number (143796888).

Almost surely, 2^1425985449 is an apocalyptic number.

It is an amenable number.

1425985449 is a deficient number, since it is larger than the sum of its proper divisors (874764759).

1425985449 is a wasteful number, since it uses less digits than its factorization.

1425985449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3994384.

The product of its digits is 2073600, while the sum is 51.

The square root of 1425985449 is about 37762.2225113936. Note that the first 3 decimals coincide. The cubic root of 1425985449 is about 1125.5678973773.

The spelling of 1425985449 in words is "one billion, four hundred twenty-five million, nine hundred eighty-five thousand, four hundred forty-nine".