861280454 has 32 divisors (see below), whose sum is σ = 1375276320. Its totient is φ = 403828992.

The previous prime is 861280451. The next prime is 861280457. The reversal of 861280454 is 454082168.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (861280451) and next prime (861280457).

It is a super-2 number, since 2×861280454² = 1483608040884892232, which contains 22 as substring.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 490442 + ... + 492194.

It is an arithmetic number, because the mean of its divisors is an integer number (42977385).

Almost surely, 2^861280454 is an apocalyptic number.

861280454 is a deficient number, since it is larger than the sum of its proper divisors (513995866).

861280454 is a wasteful number, since it uses less digits than its factorization.

861280454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024.

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 861280454 is about 29347.5800365209. The cubic root of 861280454 is about 951.4402729499.

The spelling of 861280454 in words is "eight hundred sixty-one million, two hundred eighty thousand, four hundred fifty-four".