1270387 has 6 divisors (see below), whose sum is σ = 1294188. Its totient is φ = 1247004.

The previous prime is 1270361. The next prime is 1270391. The reversal of 1270387 is 7830721.

It is a happy number.

It is not a de Polignac number, because 1270387 - 2¹⁵ = 1237619 is a prime.

It is a super-2 number, since 2×1270387² = 3227766259538, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

1270387 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1270327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4348 + ... + 4630.

It is an arithmetic number, because the mean of its divisors is an integer number (215698).

2^1270387 is an apocalyptic number.

1270387 is a deficient number, since it is larger than the sum of its proper divisors (23801).

1270387 is an frugal number, since it uses more digits than its factorization.

1270387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 1270387 is about 1127.1144573645. The cubic root of 1270387 is about 108.3042120279.

The spelling of 1270387 in words is "one million, two hundred seventy thousand, three hundred eighty-seven".