1951321 has 2 divisors, whose sum is σ = 1951322. Its totient is φ = 1951320.

The previous prime is 1951303. The next prime is 1951403. The reversal of 1951321 is 1231591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 741321 = 1100^2 + 861^2 .

It is a cyclic number.

It is not a de Polignac number, because 1951321 - 2⁵ = 1951289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1951292 and 1951301.

It is not a weakly prime, because it can be changed into another prime (1951721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975660 + 975661.

It is an arithmetic number, because the mean of its divisors is an integer number (975661).

2^1951321 is an apocalyptic number.

It is an amenable number.

1951321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1951321 is an equidigital number, since it uses as much as digits as its factorization.

1951321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270, while the sum is 22.

The square root of 1951321 is about 1396.8969181726. The cubic root of 1951321 is about 124.9615028116.

Adding to 1951321 its product of digits (270), we get a palindrome (1951591).

The spelling of 1951321 in words is "one million, nine hundred fifty-one thousand, three hundred twenty-one".