61421705 has 4 divisors (see below), whose sum is σ = 73706052. Its totient is φ = 49137360.

The previous prime is 61421687. The next prime is 61421713. The reversal of 61421705 is 50712416.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22534009 + 38887696 = 4747^2 + 6236^2 .

It is not a de Polignac number, because 61421705 - 2⁶ = 61421641 is a prime.

It is a super-3 number, since 3×61421705³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6142166 + ... + 6142175.

It is an arithmetic number, because the mean of its divisors is an integer number (18426513).

Almost surely, 2^61421705 is an apocalyptic number.

It is an amenable number.

61421705 is a deficient number, since it is larger than the sum of its proper divisors (12284347).

61421705 is a wasteful number, since it uses less digits than its factorization.

61421705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12284346.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 61421705 is about 7837.2000740060. The cubic root of 61421705 is about 394.5547619024.

It can be divided in two parts, 61421 and 705, that added together give a palindrome (62126).

The spelling of 61421705 in words is "sixty-one million, four hundred twenty-one thousand, seven hundred five".