780461 has 4 divisors (see below), whose sum is σ = 851424. Its totient is φ = 709500.

The previous prime is 780457. The next prime is 780469. The reversal of 780461 is 164087.

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 not a de Polignac number, because 780461 - 2² = 780457 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 780461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780469) 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, 35465 + ... + 35486.

It is an arithmetic number, because the mean of its divisors is an integer number (212856).

2⁷⁸⁰⁴⁶¹ is an apocalyptic number.

It is an amenable number.

780461 is a deficient number, since it is larger than the sum of its proper divisors (70963).

780461 is a wasteful number, since it uses less digits than its factorization.

780461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70962.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 780461 is about 883.4370379376. The cubic root of 780461 is about 92.0697722136.

The spelling of 780461 in words is "seven hundred eighty thousand, four hundred sixty-one".