1271430 has 64 divisors (see below), whose sum is σ = 3602880. Its totient is φ = 317952.

The previous prime is 1271429. The next prime is 1271449. The reversal of 1271430 is 341721.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4452 + ... + 4728.

It is an arithmetic number, because the mean of its divisors is an integer number (56295).

2^1271430 is an apocalyptic number.

1271430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1801440).

1271430 is an abundant number, since it is smaller than the sum of its proper divisors (2331450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271430 is a wasteful number, since it uses less digits than its factorization.

1271430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 1271430 is about 1127.5770483652. The cubic root of 1271430 is about 108.3338435216. Note that the first 3 decimals are identical.

The spelling of 1271430 in words is "one million, two hundred seventy-one thousand, four hundred thirty".