1302961287 has 4 divisors (see below), whose sum is σ = 1737281720. Its totient is φ = 868640856.

The previous prime is 1302961267. The next prime is 1302961291. The reversal of 1302961287 is 7821692031.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1302961287 - 2¹⁵ = 1302928519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302961237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217160212 + ... + 217160217.

It is an arithmetic number, because the mean of its divisors is an integer number (434320430).

Almost surely, 2^1302961287 is an apocalyptic number.

1302961287 is a deficient number, since it is larger than the sum of its proper divisors (434320433).

1302961287 is an equidigital number, since it uses as much as digits as its factorization.

1302961287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434320432.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1302961287 is about 36096.5550572350. Note that the first 3 decimals coincide. The cubic root of 1302961287 is about 1092.2209539946.

The spelling of 1302961287 in words is "one billion, three hundred two million, nine hundred sixty-one thousand, two hundred eighty-seven".