1287427149 has 16 divisors (see below), whose sum is σ = 1947882240. Its totient is φ = 840022560.

The previous prime is 1287427123. The next prime is 1287427157. The reversal of 1287427149 is 9417247821.

1287427149 is a `hidden beast` number, since 1 + 2 + 87 + 427 + 149 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1287427149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287427049) 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, 505992 + ... + 508529.

It is an arithmetic number, because the mean of its divisors is an integer number (121742640).

Almost surely, 2^1287427149 is an apocalyptic number.

It is an amenable number.

1287427149 is a deficient number, since it is larger than the sum of its proper divisors (660455091).

1287427149 is a wasteful number, since it uses less digits than its factorization.

1287427149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014577 (or 1014571 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 1287427149 is about 35880.7350677212. The cubic root of 1287427149 is about 1087.8630378906.

The spelling of 1287427149 in words is "one billion, two hundred eighty-seven million, four hundred twenty-seven thousand, one hundred forty-nine".