1247284090 has 32 divisors (see below), whose sum is σ = 2419457040. Its totient is φ = 460222464.

The previous prime is 1247284079. The next prime is 1247284091. The reversal of 1247284090 is 904827421.

It can be written as a sum of positive squares in 8 ways, for example, as 822140929 + 425143161 = 28673^2 + 20619^2 .

It is not an unprimeable number, because it can be changed into a prime (1247284091) 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, 288666 + ... + 292954.

Almost surely, 2^1247284090 is an apocalyptic number.

1247284090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1247284090 is a deficient number, since it is larger than the sum of its proper divisors (1172172950).

1247284090 is a wasteful number, since it uses less digits than its factorization.

1247284090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6546.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1247284090 is about 35316.9094061188. The cubic root of 1247284090 is about 1076.4366125403.

The spelling of 1247284090 in words is "one billion, two hundred forty-seven million, two hundred eighty-four thousand, ninety".