280425461 has 4 divisors (see below), whose sum is σ = 280492524. Its totient is φ = 280358400.

The previous prime is 280425449. The next prime is 280425463. The reversal of 280425461 is 164524082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 259403236 + 21022225 = 16106^2 + 4585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280425461 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 (280425463) 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, 26810 + ... + 35771.

It is an arithmetic number, because the mean of its divisors is an integer number (70123131).

Almost surely, 2^280425461 is an apocalyptic number.

It is an amenable number.

280425461 is a deficient number, since it is larger than the sum of its proper divisors (67063).

280425461 is an equidigital number, since it uses as much as digits as its factorization.

280425461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67062.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 280425461 is about 16745.9087839388. The cubic root of 280425461 is about 654.5444541412.

The spelling of 280425461 in words is "two hundred eighty million, four hundred twenty-five thousand, four hundred sixty-one".