261230554 has 8 divisors (see below), whose sum is σ = 421987860. Its totient is φ = 120567936.

The previous prime is 261230539. The next prime is 261230561. The reversal of 261230554 is 455032162.

It can be written as a sum of positive squares in 2 ways, for example, as 259049025 + 2181529 = 16095^2 + 1477^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5023639 + ... + 5023690.

Almost surely, 2^261230554 is an apocalyptic number.

261230554 is a deficient number, since it is larger than the sum of its proper divisors (160757306).

261230554 is a wasteful number, since it uses less digits than its factorization.

261230554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10047344.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 261230554 is about 16162.6283134891. The cubic root of 261230554 is about 639.2557706443.

The spelling of 261230554 in words is "two hundred sixty-one million, two hundred thirty thousand, five hundred fifty-four".