1357145 has 4 divisors (see below), whose sum is σ = 1628580. Its totient is φ = 1085712.

The previous prime is 1357129. The next prime is 1357163. The reversal of 1357145 is 5417531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5417531 = 7 ⋅773933.

It can be written as a sum of positive squares in 2 ways, for example, as 644809 + 712336 = 803^2 + 844^2 .

It is a cyclic number.

It is not a de Polignac number, because 1357145 - 2⁴ = 1357129 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135710 + ... + 135719.

It is an arithmetic number, because the mean of its divisors is an integer number (407145).

2^1357145 is an apocalyptic number.

It is an amenable number.

1357145 is a deficient number, since it is larger than the sum of its proper divisors (271435).

1357145 is an equidigital number, since it uses as much as digits as its factorization.

1357145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271434.

The product of its digits is 2100, while the sum is 26.

The square root of 1357145 is about 1164.9656647301. The cubic root of 1357145 is about 110.7155827607.

The spelling of 1357145 in words is "one million, three hundred fifty-seven thousand, one hundred forty-five".