1291710416 has 10 divisors (see below), whose sum is σ = 2502688962. Its totient is φ = 645855200.

The previous prime is 1291710403. The next prime is 1291710437. The reversal of 1291710416 is 6140171921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1191630400 + 100080016 = 34520^2 + 10004^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40365935 + ... + 40365966.

Almost surely, 2^1291710416 is an apocalyptic number.

1291710416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1291710416 is a deficient number, since it is larger than the sum of its proper divisors (1210978546).

1291710416 is an equidigital number, since it uses as much as digits as its factorization.

1291710416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80731909 (or 80731903 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1291710416 is about 35940.3730642852. The cubic root of 1291710416 is about 1089.0681416469.

The spelling of 1291710416 in words is "one billion, two hundred ninety-one million, seven hundred ten thousand, four hundred sixteen".