1901597 has 2 divisors, whose sum is σ = 1901598. Its totient is φ = 1901596.

The previous prime is 1901567. The next prime is 1901639. The reversal of 1901597 is 7951091.

1901597 is nontrivially palindromic in base 4.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1819801 + 81796 = 1349^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 1901597 - 2¹⁶ = 1836061 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1901507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950798 + 950799.

It is an arithmetic number, because the mean of its divisors is an integer number (950799).

2^1901597 is an apocalyptic number.

It is an amenable number.

1901597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901597 is an equidigital number, since it uses as much as digits as its factorization.

1901597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 1901597 is about 1378.9840463182. The cubic root of 1901597 is about 123.8909247194.

The spelling of 1901597 in words is "one million, nine hundred one thousand, five hundred ninety-seven".