951221 has 2 divisors, whose sum is σ = 951222. Its totient is φ = 951220.

The previous prime is 951193. The next prime is 951259. The reversal of 951221 is 122159.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 579121 + 372100 = 761^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 951221 - 2¹⁴ = 934837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 951193 and 951202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (951281) 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, 475610 + 475611.

It is an arithmetic number, because the mean of its divisors is an integer number (475611).

2⁹⁵¹²²¹ is an apocalyptic number.

It is an amenable number.

951221 is a deficient number, since it is larger than the sum of its proper divisors (1).

951221 is an equidigital number, since it uses as much as digits as its factorization.

951221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 20.

The square root of 951221 is about 975.3055931348. The cubic root of 951221 is about 98.3468550463.

The spelling of 951221 in words is "nine hundred fifty-one thousand, two hundred twenty-one".