1958401 has 4 divisors (see below), whose sum is σ = 1963732. Its totient is φ = 1953072.

The previous prime is 1958357. The next prime is 1958413. The reversal of 1958401 is 1048591.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 960400 + 998001 = 980^2 + 999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1958401 is a prime.

It is a super-3 number, since 3×1958401³ = 22533368624104665603, which contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1958401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1958431) 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, 2070 + ... + 2863.

It is an arithmetic number, because the mean of its divisors is an integer number (490933).

2^1958401 is an apocalyptic number.

It is an amenable number.

1958401 is a deficient number, since it is larger than the sum of its proper divisors (5331).

1958401 is an equidigital number, since it uses as much as digits as its factorization.

1958401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1958401 is about 1399.4288120515. The cubic root of 1958401 is about 125.1124534701.

The spelling of 1958401 in words is "one million, nine hundred fifty-eight thousand, four hundred one".