1256146 has 8 divisors (see below), whose sum is σ = 1905660. Its totient is φ = 620928.

The previous prime is 1256107. The next prime is 1256149. The reversal of 1256146 is 6416521.

It can be written as a sum of positive squares in 2 ways, for example, as 1199025 + 57121 = 1095^2 + 239^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1256146.

It is not an unprimeable number, because it can be changed into a prime (1256149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3351 + ... + 3706.

2^1256146 is an apocalyptic number.

1256146 is a deficient number, since it is larger than the sum of its proper divisors (649514).

1256146 is an equidigital number, since it uses as much as digits as its factorization.

1256146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7148.

The product of its digits is 1440, while the sum is 25.

The square root of 1256146 is about 1120.7791932401. The cubic root of 1256146 is about 107.8979946792.

The spelling of 1256146 in words is "one million, two hundred fifty-six thousand, one hundred forty-six".