1380157 has 2 divisors, whose sum is σ = 1380158. Its totient is φ = 1380156.

The previous prime is 1380149. The next prime is 1380163. The reversal of 1380157 is 7510831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 881721 + 498436 = 939^2 + 706^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380157 - 2³ = 1380149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690078 + 690079.

It is an arithmetic number, because the mean of its divisors is an integer number (690079).

2^1380157 is an apocalyptic number.

It is an amenable number.

1380157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380157 is an equidigital number, since it uses as much as digits as its factorization.

1380157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1380157 is about 1174.8008341842. The cubic root of 1380157 is about 111.3378500644.

Adding to 1380157 its reverse (7510831), we get a palindrome (8890988).

The spelling of 1380157 in words is "one million, three hundred eighty thousand, one hundred fifty-seven".