1225965 has 16 divisors (see below), whose sum is σ = 2112768. Its totient is φ = 603456.

The previous prime is 1225963. The next prime is 1225981. The reversal of 1225965 is 5695221.

1225965 = T₁₁₈ + T₁₁₉ + ... + T₂₀₇.

It is a happy number.

It is not a de Polignac number, because 1225965 - 2¹ = 1225963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2949 + ... + 3338.

It is an arithmetic number, because the mean of its divisors is an integer number (132048).

2^1225965 is an apocalyptic number.

1225965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225965 is a deficient number, since it is larger than the sum of its proper divisors (886803).

1225965 is a wasteful number, since it uses less digits than its factorization.

1225965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308.

The product of its digits is 5400, while the sum is 30.

The square root of 1225965 is about 1107.2330378019. The cubic root of 1225965 is about 107.0268369520.

The spelling of 1225965 in words is "one million, two hundred twenty-five thousand, nine hundred sixty-five".