61405361 has 4 divisors (see below), whose sum is σ = 61435392. Its totient is φ = 61375332.

The previous prime is 61405349. The next prime is 61405367. The reversal of 61405361 is 16350416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61405361 - 2¹⁰ = 61404337 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 61405361.

It is not an unprimeable number, because it can be changed into a prime (61405367) 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, 11705 + ... + 16118.

It is an arithmetic number, because the mean of its divisors is an integer number (15358848).

Almost surely, 2^61405361 is an apocalyptic number.

It is an amenable number.

61405361 is a deficient number, since it is larger than the sum of its proper divisors (30031).

61405361 is a wasteful number, since it uses less digits than its factorization.

61405361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30030.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 61405361 is about 7836.1572853025. The cubic root of 61405361 is about 394.5197624664.

Adding to 61405361 its reverse (16350416), we get a palindrome (77755777).

The spelling of 61405361 in words is "sixty-one million, four hundred five thousand, three hundred sixty-one".