1491246290 has 16 divisors (see below), whose sum is σ = 2842140312. Its totient is φ = 561410304.

The previous prime is 1491246277. The next prime is 1491246343. The reversal of 1491246290 is 926421941.

It can be written as a sum of positive squares in 4 ways, for example, as 1473715321 + 17530969 = 38389^2 + 4187^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4385849 + ... + 4386188.

Almost surely, 2^1491246290 is an apocalyptic number.

1491246290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1491246290 is a deficient number, since it is larger than the sum of its proper divisors (1350894022).

1491246290 is a wasteful number, since it uses less digits than its factorization.

1491246290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8772061.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1491246290 is about 38616.6581930648. The cubic root of 1491246290 is about 1142.4831197719.

The spelling of 1491246290 in words is "one billion, four hundred ninety-one million, two hundred forty-six thousand, two hundred ninety".