1375261 has 2 divisors, whose sum is σ = 1375262. Its totient is φ = 1375260.

The previous prime is 1375243. The next prime is 1375303. The reversal of 1375261 is 1625731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1279161 + 96100 = 1131^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375261 - 2⁷ = 1375133 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1375211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687630 + 687631.

It is an arithmetic number, because the mean of its divisors is an integer number (687631).

2^1375261 is an apocalyptic number.

It is an amenable number.

1375261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375261 is an equidigital number, since it uses as much as digits as its factorization.

1375261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 1375261 is about 1172.7152254490. The cubic root of 1375261 is about 111.2060399476.

The spelling of 1375261 in words is "one million, three hundred seventy-five thousand, two hundred sixty-one".