61121453 has 4 divisors (see below), whose sum is σ = 61215708. Its totient is φ = 61027200.

The previous prime is 61121399. The next prime is 61121507. The reversal of 61121453 is 35412116.

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

It is an interprime number because it is at equal distance from previous prime (61121399) and next prime (61121507).

It can be written as a sum of positive squares in 2 ways, for example, as 40934404 + 20187049 = 6398^2 + 4493^2 .

It is a cyclic number.

It is not a de Polignac number, because 61121453 - 2¹⁴ = 61105069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61127453) 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, 46148 + ... + 47453.

It is an arithmetic number, because the mean of its divisors is an integer number (15303927).

Almost surely, 2^61121453 is an apocalyptic number.

It is an amenable number.

61121453 is a deficient number, since it is larger than the sum of its proper divisors (94255).

61121453 is an equidigital number, since it uses as much as digits as its factorization.

61121453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94254.

The product of its digits is 720, while the sum is 23.

The square root of 61121453 is about 7818.0210411587. The cubic root of 61121453 is about 393.9108016102.

Adding to 61121453 its reverse (35412116), we get a palindrome (96533569).

The spelling of 61121453 in words is "sixty-one million, one hundred twenty-one thousand, four hundred fifty-three".