1253905 has 16 divisors (see below), whose sum is σ = 1615680. Its totient is φ = 931392.

The previous prime is 1253897. The next prime is 1253909. The reversal of 1253905 is 5093521.

1253905 = T₁₅₉ + T₁₆₀ + ... + T₂₂₅.

It is a cyclic number.

It is not a de Polignac number, because 1253905 - 2³ = 1253897 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1253905.

It is not an unprimeable number, because it can be changed into a prime (1253909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6267 + ... + 6463.

It is an arithmetic number, because the mean of its divisors is an integer number (100980).

2^1253905 is an apocalyptic number.

It is an amenable number.

1253905 is a deficient number, since it is larger than the sum of its proper divisors (361775).

1253905 is a wasteful number, since it uses less digits than its factorization.

1253905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 1253905 is about 1119.7789960523. The cubic root of 1253905 is about 107.8337921260.

The spelling of 1253905 in words is "one million, two hundred fifty-three thousand, nine hundred five".