1201381 has 2 divisors, whose sum is σ = 1201382. Its totient is φ = 1201380.

The previous prime is 1201337. The next prime is 1201439. The reversal of 1201381 is 1831021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1136356 + 65025 = 1066^2 + 255^2 .

It is an emirp because it is prime and its reverse (1831021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1201381 - 2⁹ = 1200869 is a prime.

It is a super-2 number, since 2×1201381² = 2886632614322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600690 + 600691.

It is an arithmetic number, because the mean of its divisors is an integer number (600691).

2^1201381 is an apocalyptic number.

It is an amenable number.

1201381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201381 is an equidigital number, since it uses as much as digits as its factorization.

1201381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1201381 is about 1096.0752711379. The cubic root of 1201381 is about 106.3066060539.

The spelling of 1201381 in words is "one million, two hundred one thousand, three hundred eighty-one".