1237281 has 8 divisors (see below), whose sum is σ = 1669920. Its totient is φ = 814752.

The previous prime is 1237279. The next prime is 1237283. The reversal of 1237281 is 1827321.

It is an interprime number because it is at equal distance from previous prime (1237279) and next prime (1237283).

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

It is not a de Polignac number, because 1237281 - 2¹ = 1237279 is a prime.

It is a super-2 number, since 2×1237281² = 3061728545922, which contains 22 as substring.

1237281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1237283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2236 + ... + 2733.

It is an arithmetic number, because the mean of its divisors is an integer number (208740).

2^1237281 is an apocalyptic number.

1237281 is the 704-th centered pentagonal number.

It is an amenable number.

1237281 is a deficient number, since it is larger than the sum of its proper divisors (432639).

1237281 is an equidigital number, since it uses as much as digits as its factorization.

1237281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055.

The product of its digits is 672, while the sum is 24.

The square root of 1237281 is about 1112.3313355291. The cubic root of 1237281 is about 107.3551248357.

The spelling of 1237281 in words is "one million, two hundred thirty-seven thousand, two hundred eighty-one".