61243253 has 4 divisors (see below), whose sum is σ = 61263840. Its totient is φ = 61222668.

The previous prime is 61243229. The next prime is 61243267. The reversal of 61243253 is 35234216.

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 61243253 - 2¹⁶ = 61177717 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 (61243283) 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, 4883 + ... + 12096.

It is an arithmetic number, because the mean of its divisors is an integer number (15315960).

Almost surely, 2^61243253 is an apocalyptic number.

It is an amenable number.

61243253 is a deficient number, since it is larger than the sum of its proper divisors (20587).

61243253 is a wasteful number, since it uses less digits than its factorization.

61243253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20586.

The product of its digits is 4320, while the sum is 26.

The square root of 61243253 is about 7825.8068593596. The cubic root of 61243253 is about 394.1722837296.

Adding to 61243253 its reverse (35234216), we get a palindrome (96477469).

The spelling of 61243253 in words is "sixty-one million, two hundred forty-three thousand, two hundred fifty-three".