1385224837 has 4 divisors (see below), whose sum is σ = 1385444736. Its totient is φ = 1385004940.

The previous prime is 1385224807. The next prime is 1385224847. The reversal of 1385224837 is 7384225831.

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 1385224837 - 2¹⁵ = 1385192069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1385224793 and 1385224802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385224807) 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, 100213 + ... + 113194.

It is an arithmetic number, because the mean of its divisors is an integer number (346361184).

Almost surely, 2^1385224837 is an apocalyptic number.

It is an amenable number.

1385224837 is a deficient number, since it is larger than the sum of its proper divisors (219899).

1385224837 is an equidigital number, since it uses as much as digits as its factorization.

1385224837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219898.

The product of its digits is 322560, while the sum is 43.

The square root of 1385224837 is about 37218.6087461635. The cubic root of 1385224837 is about 1114.7395845945.

The spelling of 1385224837 in words is "one billion, three hundred eighty-five million, two hundred twenty-four thousand, eight hundred thirty-seven".