1291057514 has 4 divisors (see below), whose sum is σ = 1936586274. Its totient is φ = 645528756.

The previous prime is 1291057513. The next prime is 1291057541. The reversal of 1291057514 is 4157501921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4157501921 = 14593 ⋅284897.

It can be written as a sum of positive squares in only one way, i.e., 927507025 + 363550489 = 30455^2 + 19067^2 .

It is not an unprimeable number, because it can be changed into a prime (1291057513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322764377 + ... + 322764380.

Almost surely, 2^1291057514 is an apocalyptic number.

1291057514 is a deficient number, since it is larger than the sum of its proper divisors (645528760).

1291057514 is an equidigital number, since it uses as much as digits as its factorization.

1291057514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645528759.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 1291057514 is about 35931.2887884640. The cubic root of 1291057514 is about 1088.8846189329.

The spelling of 1291057514 in words is "one billion, two hundred ninety-one million, fifty-seven thousand, five hundred fourteen".