61342121 has 4 divisors (see below), whose sum is σ = 61974612. Its totient is φ = 60709632.

The previous prime is 61342111. The next prime is 61342129. The reversal of 61342121 is 12124316.

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 44408896 + 16933225 = 6664^2 + 4115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61342121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61342093 and 61342102.

It is not an unprimeable number, because it can be changed into a prime (61342129) 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, 316100 + ... + 316293.

It is an arithmetic number, because the mean of its divisors is an integer number (15493653).

Almost surely, 2^61342121 is an apocalyptic number.

It is an amenable number.

61342121 is a deficient number, since it is larger than the sum of its proper divisors (632491).

61342121 is an equidigital number, since it uses as much as digits as its factorization.

61342121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632490.

The product of its digits is 288, while the sum is 20.

The square root of 61342121 is about 7832.1211047838. The cubic root of 61342121 is about 394.3842802695.

Adding to 61342121 its reverse (12124316), we get a palindrome (73466437).

The spelling of 61342121 in words is "sixty-one million, three hundred forty-two thousand, one hundred twenty-one".