1285348357 has 4 divisors (see below), whose sum is σ = 1285433676. Its totient is φ = 1285263040.

The previous prime is 1285348333. The next prime is 1285348373. The reversal of 1285348357 is 7538435821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 575712036 + 709636321 = 23994^2 + 26639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285348357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285348397) 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, 13348 + ... + 52429.

It is an arithmetic number, because the mean of its divisors is an integer number (321358419).

Almost surely, 2^1285348357 is an apocalyptic number.

It is an amenable number.

1285348357 is a deficient number, since it is larger than the sum of its proper divisors (85319).

1285348357 is an equidigital number, since it uses as much as digits as its factorization.

1285348357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85318.

The product of its digits is 806400, while the sum is 46.

The square root of 1285348357 is about 35851.7552847835. The cubic root of 1285348357 is about 1087.2772029955.

The spelling of 1285348357 in words is "one billion, two hundred eighty-five million, three hundred forty-eight thousand, three hundred fifty-seven".