1255357457 has 4 divisors (see below), whose sum is σ = 1309938240. Its totient is φ = 1200776676.

The previous prime is 1255357429. The next prime is 1255357459. The reversal of 1255357457 is 7547535521.

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.

It is a cyclic number.

It is not a de Polignac number, because 1255357457 - 2¹² = 1255353361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255357459) 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, 27290357 + ... + 27290402.

It is an arithmetic number, because the mean of its divisors is an integer number (327484560).

Almost surely, 2^1255357457 is an apocalyptic number.

It is an amenable number.

1255357457 is a deficient number, since it is larger than the sum of its proper divisors (54580783).

1255357457 is an equidigital number, since it uses as much as digits as its factorization.

1255357457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54580782.

The product of its digits is 735000, while the sum is 44.

The square root of 1255357457 is about 35431.0239338352. The cubic root of 1255357457 is about 1078.7541237371.

The spelling of 1255357457 in words is "one billion, two hundred fifty-five million, three hundred fifty-seven thousand, four hundred fifty-seven".