1358452257 has 4 divisors (see below), whose sum is σ = 1811269680. Its totient is φ = 905634836.

The previous prime is 1358452231. The next prime is 1358452267. The reversal of 1358452257 is 7522548531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7522548531 = 3 ⋅2507516177.

It is a cyclic number.

It is not a de Polignac number, because 1358452257 - 2⁷ = 1358452129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1358452267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226408707 + ... + 226408712.

It is an arithmetic number, because the mean of its divisors is an integer number (452817420).

Almost surely, 2^1358452257 is an apocalyptic number.

It is an amenable number.

1358452257 is a deficient number, since it is larger than the sum of its proper divisors (452817423).

1358452257 is an equidigital number, since it uses as much as digits as its factorization.

1358452257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452817422.

The product of its digits is 336000, while the sum is 42.

The square root of 1358452257 is about 36857.1873180795. The cubic root of 1358452257 is about 1107.5111992984.

The spelling of 1358452257 in words is "one billion, three hundred fifty-eight million, four hundred fifty-two thousand, two hundred fifty-seven".