1280349371 has 32 divisors (see below), whose sum is σ = 1580544000. Its totient is φ = 1033845120.

The previous prime is 1280349359. The next prime is 1280349379. The reversal of 1280349371 is 1739430821.

It is not a de Polignac number, because 1280349371 - 2⁶ = 1280349307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1280349379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1452851 + ... + 1453731.

It is an arithmetic number, because the mean of its divisors is an integer number (49392000).

Almost surely, 2^1280349371 is an apocalyptic number.

1280349371 is a deficient number, since it is larger than the sum of its proper divisors (300194629).

1280349371 is an equidigital number, since it uses as much as digits as its factorization.

1280349371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1280349371 is about 35781.9699150284. The cubic root of 1280349371 is about 1085.8658229430.

The spelling of 1280349371 in words is "one billion, two hundred eighty million, three hundred forty-nine thousand, three hundred seventy-one".