861280453 has 4 divisors (see below), whose sum is σ = 939578688. Its totient is φ = 782982220.

The previous prime is 861280451. The next prime is 861280457. The reversal of 861280453 is 354082168.

It is a happy number.

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 861280453 - 2¹ = 861280451 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 (861280451) 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, 39149101 + ... + 39149122.

It is an arithmetic number, because the mean of its divisors is an integer number (234894672).

Almost surely, 2^861280453 is an apocalyptic number.

It is an amenable number.

861280453 is a deficient number, since it is larger than the sum of its proper divisors (78298235).

861280453 is a wasteful number, since it uses less digits than its factorization.

861280453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78298234.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 861280453 is about 29347.5800194837. The cubic root of 861280453 is about 951.4402725816.

The spelling of 861280453 in words is "eight hundred sixty-one million, two hundred eighty thousand, four hundred fifty-three".