261429419 has 4 divisors (see below), whose sum is σ = 261471600. Its totient is φ = 261387240.

The previous prime is 261429409. The next prime is 261429449. The reversal of 261429419 is 914924162.

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

It is a cyclic number.

It is not a de Polignac number, because 261429419 - 2²⁴ = 244652203 is a prime.

It is a super-2 number, since 2×261429419² = 136690682237355122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261429409) 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, 9767 + ... + 24864.

It is an arithmetic number, because the mean of its divisors is an integer number (65367900).

Almost surely, 2^261429419 is an apocalyptic number.

261429419 is a deficient number, since it is larger than the sum of its proper divisors (42181).

261429419 is an equidigital number, since it uses as much as digits as its factorization.

261429419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42180.

The product of its digits is 31104, while the sum is 38.

The square root of 261429419 is about 16168.7791437696. The cubic root of 261429419 is about 639.4179432946.

The spelling of 261429419 in words is "two hundred sixty-one million, four hundred twenty-nine thousand, four hundred nineteen".