261421346 has 8 divisors (see below), whose sum is σ = 392729040. Its totient is φ = 130511668.

The previous prime is 261421343. The next prime is 261421351. The reversal of 261421346 is 643124162.

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

It is a super-2 number, since 2×261421346² = 136682240288903432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261421343) 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, 97856 + ... + 100491.

It is an arithmetic number, because the mean of its divisors is an integer number (49091130).

Almost surely, 2^261421346 is an apocalyptic number.

261421346 is a deficient number, since it is larger than the sum of its proper divisors (131307694).

261421346 is a wasteful number, since it uses less digits than its factorization.

261421346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199008.

The product of its digits is 6912, while the sum is 29.

The square root of 261421346 is about 16168.5294940511. The cubic root of 261421346 is about 639.4113614363.

The spelling of 261421346 in words is "two hundred sixty-one million, four hundred twenty-one thousand, three hundred forty-six".