1238981 has 8 divisors (see below), whose sum is σ = 1280664. Its totient is φ = 1198080.

The previous prime is 1238947. The next prime is 1238989. The reversal of 1238981 is 1898321.

It can be written as a sum of positive squares in 4 ways, for example, as 410881 + 828100 = 641^2 + 910^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1238981 - 2⁶ = 1238917 is a prime.

It is a super-2 number, since 2×1238981² = 3070147836722, which contains 22 as substring.

It is an Ulam number.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238989) 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, 5021 + ... + 5261.

It is an arithmetic number, because the mean of its divisors is an integer number (160083).

2^1238981 is an apocalyptic number.

It is an amenable number.

1238981 is a deficient number, since it is larger than the sum of its proper divisors (41683).

1238981 is an equidigital number, since it uses as much as digits as its factorization.

1238981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its digits is 3456, while the sum is 32.

The square root of 1238981 is about 1113.0952340209. The cubic root of 1238981 is about 107.4042702846.

The spelling of 1238981 in words is "one million, two hundred thirty-eight thousand, nine hundred eighty-one".