1051591 has 2 divisors, whose sum is σ = 1051592. Its totient is φ = 1051590.

The previous prime is 1051571. The next prime is 1051601. The reversal of 1051591 is 1951501.

It is a strong prime.

It is an emirp because it is prime and its reverse (1951501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1051591 - 2⁵ = 1051559 is a prime.

It is a super-2 number, since 2×1051591² = 2211687262562, which contains 22 as substring.

It is equal to p₈₂₂₃₇ and since 1051591 and 82237 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525795 + 525796.

It is an arithmetic number, because the mean of its divisors is an integer number (525796).

2^1051591 is an apocalyptic number.

1051591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051591 is an equidigital number, since it uses as much as digits as its factorization.

1051591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 1051591 is about 1025.4711112459. The cubic root of 1051591 is about 101.6909458572.

The spelling of 1051591 in words is "one million, fifty-one thousand, five hundred ninety-one".