1956401 has 4 divisors (see below), whose sum is σ = 1959204. Its totient is φ = 1953600.

The previous prime is 1956391. The next prime is 1956419. The reversal of 1956401 is 1046591.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1392400 + 564001 = 1180^2 + 751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1956401 - 2⁶ = 1956337 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1956431) 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, 581 + ... + 2061.

It is an arithmetic number, because the mean of its divisors is an integer number (489801).

2^1956401 is an apocalyptic number.

It is an amenable number.

1956401 is a deficient number, since it is larger than the sum of its proper divisors (2803).

1956401 is a wasteful number, since it uses less digits than its factorization.

1956401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1956401 is about 1398.7140522637. The cubic root of 1956401 is about 125.0698489617.

The spelling of 1956401 in words is "one million, nine hundred fifty-six thousand, four hundred one".