1505381 has 2 divisors, whose sum is σ = 1505382. Its totient is φ = 1505380.

The previous prime is 1505369. The next prime is 1505407. The reversal of 1505381 is 1835051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1288225 + 217156 = 1135^2 + 466^2 .

It is an emirp because it is prime and its reverse (1835051) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1505381 is a prime.

It is a super-2 number, since 2×1505381² = 4532343910322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1505311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 752690 + 752691.

It is an arithmetic number, because the mean of its divisors is an integer number (752691).

2^1505381 is an apocalyptic number.

It is an amenable number.

1505381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1505381 is an equidigital number, since it uses as much as digits as its factorization.

1505381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1505381 is about 1226.9396888193. The cubic root of 1505381 is about 114.6081432852.

The spelling of 1505381 in words is "one million, five hundred five thousand, three hundred eighty-one".