785011421 has 4 divisors (see below), whose sum is σ = 785071644. Its totient is φ = 784951200.

The previous prime is 785011373. The next prime is 785011439. The reversal of 785011421 is 124110587.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124110587 = 1901 ⋅65287.

It can be written as a sum of positive squares in 2 ways, for example, as 279391225 + 505620196 = 16715^2 + 22486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-785011421 is a prime.

It is a super-2 number, since 2×785011421² = 1232485862200878482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (785011441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1490 + ... + 39651.

It is an arithmetic number, because the mean of its divisors is an integer number (196267911).

Almost surely, 2^785011421 is an apocalyptic number.

It is an amenable number.

785011421 is a deficient number, since it is larger than the sum of its proper divisors (60223).

785011421 is a wasteful number, since it uses less digits than its factorization.

785011421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60222.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 785011421 is about 28018.0552679875. The cubic root of 785011421 is about 922.4836094551.

The spelling of 785011421 in words is "seven hundred eighty-five million, eleven thousand, four hundred twenty-one".