1357441 has 4 divisors (see below), whose sum is σ = 1360132. Its totient is φ = 1354752.

The previous prime is 1357429. The next prime is 1357453. The reversal of 1357441 is 1447531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1447531 = 97 ⋅14923.

It is an interprime number because it is at equal distance from previous prime (1357429) and next prime (1357453).

It can be written as a sum of positive squares in 2 ways, for example, as 817216 + 540225 = 904^2 + 735^2 .

It is a 3-Lehmer number, since φ(1357441) divides (1357441-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1357441 is a prime.

It is an Ulam number.

It is a Duffinian number.

1357441 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1352441) 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, 336 + ... + 1681.

It is an arithmetic number, because the mean of its divisors is an integer number (340033).

It is a Poulet number, since it divides 2^1357440-1.

2^1357441 is an apocalyptic number.

1357441 is the 673-rd octagonal number.

It is an amenable number.

1357441 is a deficient number, since it is larger than the sum of its proper divisors (2691).

1357441 is an equidigital number, since it uses as much as digits as its factorization.

1357441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690.

The product of its digits is 1680, while the sum is 25.

The square root of 1357441 is about 1165.0927001745. The cubic root of 1357441 is about 110.7236313800.

The spelling of 1357441 in words is "one million, three hundred fifty-seven thousand, four hundred forty-one".