1253906 has 4 divisors (see below), whose sum is σ = 1880862. Its totient is φ = 626952.

The previous prime is 1253897. The next prime is 1253909. The reversal of 1253906 is 6093521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1229881 + 24025 = 1109^2 + 155^2 .

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 as a sum of consecutive naturals, namely, 313475 + ... + 313478.

2^1253906 is an apocalyptic number.

1253906 is a deficient number, since it is larger than the sum of its proper divisors (626956).

1253906 is an equidigital number, since it uses as much as digits as its factorization.

1253906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626955.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 1253906 is about 1119.7794425689. The cubic root of 1253906 is about 107.8338207921.

The spelling of 1253906 in words is "one million, two hundred fifty-three thousand, nine hundred six".