1256133 has 8 divisors (see below), whose sum is σ = 1680448. Its totient is φ = 834624.

The previous prime is 1256107. The next prime is 1256149. The reversal of 1256133 is 3316521.

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

It is not a de Polignac number, because 1256133 - 2¹⁰ = 1255109 is a prime.

It is a super-2 number, since 2×1256133² = 3155740227378, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816 + ... + 1782.

It is an arithmetic number, because the mean of its divisors is an integer number (210056).

2^1256133 is an apocalyptic number.

It is an amenable number.

1256133 is a deficient number, since it is larger than the sum of its proper divisors (424315).

1256133 is an equidigital number, since it uses as much as digits as its factorization.

1256133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403.

The product of its digits is 540, while the sum is 21.

The square root of 1256133 is about 1120.7733936885. The cubic root of 1256133 is about 107.8976224616.

The spelling of 1256133 in words is "one million, two hundred fifty-six thousand, one hundred thirty-three".