1287474090 has 64 divisors (see below), whose sum is σ = 3739094784. Its totient is φ = 276968448.

The previous prime is 1287474079. The next prime is 1287474091. The reversal of 1287474090 is 904747821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1287474091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176749 + ... + 183888.

It is an arithmetic number, because the mean of its divisors is an integer number (58423356).

Almost surely, 2^1287474090 is an apocalyptic number.

1287474090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1287474090 is an abundant number, since it is smaller than the sum of its proper divisors (2451620694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1287474090 is a wasteful number, since it uses less digits than its factorization.

1287474090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360671.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 1287474090 is about 35881.3891871538. The cubic root of 1287474090 is about 1087.8762592881.

The spelling of 1287474090 in words is "one billion, two hundred eighty-seven million, four hundred seventy-four thousand, ninety".