1270981 has 2 divisors, whose sum is σ = 1270982. Its totient is φ = 1270980.

The previous prime is 1270961. The next prime is 1271027. The reversal of 1270981 is 1890721.

1270981 = T₉₁₉ + T₉₂₀ + T₉₂₁.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 320356 = 975^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 1270981 - 2¹⁷ = 1139909 is a prime.

It is a super-2 number, since 2×1270981² = 3230785404722, which contains 22 as substring.

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

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1270901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635490 + 635491.

It is an arithmetic number, because the mean of its divisors is an integer number (635491).

2^1270981 is an apocalyptic number.

1270981 is the 921-st centered triangular number.

It is an amenable number.

1270981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270981 is an equidigital number, since it uses as much as digits as its factorization.

1270981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1270981 is about 1127.3779313079. The cubic root of 1270981 is about 108.3210894775.

The spelling of 1270981 in words is "one million, two hundred seventy thousand, nine hundred eighty-one".