1280137 has 4 divisors (see below), whose sum is σ = 1286416. Its totient is φ = 1273860.

The previous prime is 1280131. The next prime is 1280141. The reversal of 1280137 is 7310821.

1280137 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1280137 - 2³ = 1280129 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1280131) 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, 2823 + ... + 3244.

It is an arithmetic number, because the mean of its divisors is an integer number (321604).

2^1280137 is an apocalyptic number.

It is an amenable number.

1280137 is a deficient number, since it is larger than the sum of its proper divisors (6279).

1280137 is an equidigital number, since it uses as much as digits as its factorization.

1280137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6278.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1280137 is about 1131.4313942966. The cubic root of 1280137 is about 108.5805782257.

Adding to 1280137 its reverse (7310821), we get a palindrome (8590958).

The spelling of 1280137 in words is "one million, two hundred eighty thousand, one hundred thirty-seven".