1157381 has 2 divisors, whose sum is σ = 1157382. Its totient is φ = 1157380.

The previous prime is 1157369. The next prime is 1157393. The reversal of 1157381 is 1837511.

It is a balanced prime because it is at equal distance from previous prime (1157369) and next prime (1157393).

It can be written as a sum of positive squares in only one way, i.e., 1136356 + 21025 = 1066^2 + 145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157381 is a prime.

It is a super-2 number, since 2×1157381² = 2679061558322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1157381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578690 + 578691.

It is an arithmetic number, because the mean of its divisors is an integer number (578691).

2^1157381 is an apocalyptic number.

It is an amenable number.

1157381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157381 is an equidigital number, since it uses as much as digits as its factorization.

1157381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 26.

The square root of 1157381 is about 1075.8164341559. The cubic root of 1157381 is about 104.9926223085.

The spelling of 1157381 in words is "one million, one hundred fifty-seven thousand, three hundred eighty-one".