1357999 has 4 divisors (see below), whose sum is σ = 1361880. Its totient is φ = 1354120.

The previous prime is 1357969. The next prime is 1358009. The reversal of 1357999 is 9997531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9997531 = 31 ⋅322501.

It is a cyclic number.

It is not a de Polignac number, because 1357999 - 2⁷ = 1357871 is a prime.

It is a super-2 number, since 2×1357999² = 3688322568002, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1357919) 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, 1357 + ... + 2134.

It is an arithmetic number, because the mean of its divisors is an integer number (340470).

2^1357999 is an apocalyptic number.

1357999 is a deficient number, since it is larger than the sum of its proper divisors (3881).

1357999 is an equidigital number, since it uses as much as digits as its factorization.

1357999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880.

The product of its digits is 76545, while the sum is 43.

The square root of 1357999 is about 1165.3321414944. The cubic root of 1357999 is about 110.7388009337.

The spelling of 1357999 in words is "one million, three hundred fifty-seven thousand, nine hundred ninety-nine".