261407003 has 12 divisors (see below), whose sum is σ = 308797128. Its totient is φ = 219360960.

The previous prime is 261406991. The next prime is 261407023. The reversal of 261407003 is 300704162.

261407003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 261407003 - 2¹² = 261402907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261407003.

It is not an unprimeable number, because it can be changed into a prime (261407023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68450 + ... + 72167.

It is an arithmetic number, because the mean of its divisors is an integer number (25733094).

Almost surely, 2^261407003 is an apocalyptic number.

261407003 is a deficient number, since it is larger than the sum of its proper divisors (47390125).

261407003 is a wasteful number, since it uses less digits than its factorization.

261407003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140654 (or 140641 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 261407003 is about 16168.0859411373. The cubic root of 261407003 is about 639.3996673582.

The spelling of 261407003 in words is "two hundred sixty-one million, four hundred seven thousand, three".