261367403 has 8 divisors (see below), whose sum is σ = 286879296. Its totient is φ = 236147400.

The previous prime is 261367391. The next prime is 261367409. The reversal of 261367403 is 304763162.

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

It is a cyclic number.

It is not a de Polignac number, because 261367403 - 2¹⁰ = 261366379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261367403.

It is not an unprimeable number, because it can be changed into a prime (261367409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71093 + ... + 74678.

It is an arithmetic number, because the mean of its divisors is an integer number (35859912).

Almost surely, 2^261367403 is an apocalyptic number.

261367403 is a deficient number, since it is larger than the sum of its proper divisors (25511893).

261367403 is a wasteful number, since it uses less digits than its factorization.

261367403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145945.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 261367403 is about 16166.8612599973. The cubic root of 261367403 is about 639.3673786217.

The spelling of 261367403 in words is "two hundred sixty-one million, three hundred sixty-seven thousand, four hundred three".