1270440361 has 2 divisors, whose sum is σ = 1270440362. Its totient is φ = 1270440360.

The previous prime is 1270440359. The next prime is 1270440373. The reversal of 1270440361 is 1630440721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1258049961 + 12390400 = 35469^2 + 3520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1270440361 - 2¹ = 1270440359 is a prime.

It is a super-2 number, since 2×1270440361² = 3228037421715620642, which contains 22 as substring.

Together with 1270440359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1270440341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635220180 + 635220181.

It is an arithmetic number, because the mean of its divisors is an integer number (635220181).

Almost surely, 2^1270440361 is an apocalyptic number.

It is an amenable number.

1270440361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270440361 is an equidigital number, since it uses as much as digits as its factorization.

1270440361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1270440361 is about 35643.2372407446. The cubic root of 1270440361 is about 1083.0572840051.

The spelling of 1270440361 in words is "one billion, two hundred seventy million, four hundred forty thousand, three hundred sixty-one".