1225131 has 8 divisors (see below), whose sum is σ = 1641024. Its totient is φ = 813000.

The previous prime is 1225129. The next prime is 1225153. The reversal of 1225131 is 1315221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1225131 - 2¹ = 1225129 is a prime.

It is a super-2 number, since 2×1225131² = 3001891934322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1225131.

It is not an unprimeable number, because it can be changed into a prime (1225111) 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 in 7 ways as a sum of consecutive naturals, for example, 61 + ... + 1566.

It is an arithmetic number, because the mean of its divisors is an integer number (205128).

2^1225131 is an apocalyptic number.

1225131 is a deficient number, since it is larger than the sum of its proper divisors (415893).

1225131 is a wasteful number, since it uses less digits than its factorization.

1225131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881.

The product of its digits is 60, while the sum is 15.

The square root of 1225131 is about 1106.8563592445. The cubic root of 1225131 is about 107.0025620256.

It can be divided in two parts, 122 and 5131, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 1225131 in words is "one million, two hundred twenty-five thousand, one hundred thirty-one".