261401414 has 4 divisors (see below), whose sum is σ = 392102124. Its totient is φ = 130700706.

The previous prime is 261401407. The next prime is 261401419. The reversal of 261401414 is 414104162.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 261401414.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261401419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65350352 + ... + 65350355.

It is an arithmetic number, because the mean of its divisors is an integer number (98025531).

Almost surely, 2^261401414 is an apocalyptic number.

261401414 is a deficient number, since it is larger than the sum of its proper divisors (130700710).

261401414 is a wasteful number, since it uses less digits than its factorization.

261401414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130700709.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 261401414 is about 16167.9130997170. The cubic root of 261401414 is about 639.3951104410.

Adding to 261401414 its reverse (414104162), we get a palindrome (675505576).

The spelling of 261401414 in words is "two hundred sixty-one million, four hundred one thousand, four hundred fourteen".