1378957 has 2 divisors, whose sum is σ = 1378958. Its totient is φ = 1378956.

The previous prime is 1378943. The next prime is 1378961. The reversal of 1378957 is 7598731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1142761 + 236196 = 1069^2 + 486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1378957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689478 + 689479.

It is an arithmetic number, because the mean of its divisors is an integer number (689479).

2^1378957 is an apocalyptic number.

It is an amenable number.

1378957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378957 is an equidigital number, since it uses as much as digits as its factorization.

1378957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 40.

The square root of 1378957 is about 1174.2899982543. The cubic root of 1378957 is about 111.3055725383.

The spelling of 1378957 in words is "one million, three hundred seventy-eight thousand, nine hundred fifty-seven".