1370921 has 2 divisors, whose sum is σ = 1370922. Its totient is φ = 1370920.

The previous prime is 1370909. The next prime is 1370933. The reversal of 1370921 is 1290731.

It is a balanced prime because it is at equal distance from previous prime (1370909) and next prime (1370933).

It can be written as a sum of positive squares in only one way, i.e., 1155625 + 215296 = 1075^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1370921 - 2⁶ = 1370857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1370981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685460 + 685461.

It is an arithmetic number, because the mean of its divisors is an integer number (685461).

2^1370921 is an apocalyptic number.

It is an amenable number.

1370921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1370921 is an equidigital number, since it uses as much as digits as its factorization.

1370921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1370921 is about 1170.8633566732. The cubic root of 1370921 is about 111.0889366490.

The spelling of 1370921 in words is "one million, three hundred seventy thousand, nine hundred twenty-one".