1257481 has 8 divisors (see below), whose sum is σ = 1296000. Its totient is φ = 1219680.

The previous prime is 1257463. The next prime is 1257491. The reversal of 1257481 is 1847521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1257481 is a prime.

It is a super-2 number, since 2×1257481² = 3162516930722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1257461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6220 + ... + 6418.

It is an arithmetic number, because the mean of its divisors is an integer number (162000).

2^1257481 is an apocalyptic number.

It is an amenable number.

1257481 is a deficient number, since it is larger than the sum of its proper divisors (38519).

1257481 is an equidigital number, since it uses as much as digits as its factorization.

1257481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359.

The product of its digits is 2240, while the sum is 28.

The square root of 1257481 is about 1121.3746028870. The cubic root of 1257481 is about 107.9362048937.

The spelling of 1257481 in words is "one million, two hundred fifty-seven thousand, four hundred eighty-one".