61273249 has 2 divisors, whose sum is σ = 61273250. Its totient is φ = 61273248.

The previous prime is 61273243. The next prime is 61273283. The reversal of 61273249 is 94237216.

It is an a-pointer prime, because the next prime (61273283) can be obtained adding 61273249 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48720400 + 12552849 = 6980^2 + 3543^2 .

It is a cyclic number.

It is not a de Polignac number, because 61273249 - 2⁵ = 61273217 is a prime.

It is a super-2 number, since 2×61273249² = 7508822086032002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61273243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30636624 + 30636625.

It is an arithmetic number, because the mean of its divisors is an integer number (30636625).

Almost surely, 2^61273249 is an apocalyptic number.

It is an amenable number.

61273249 is a deficient number, since it is larger than the sum of its proper divisors (1).

61273249 is an equidigital number, since it uses as much as digits as its factorization.

61273249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 61273249 is about 7827.7231044538. The cubic root of 61273249 is about 394.2366263928.

The spelling of 61273249 in words is "sixty-one million, two hundred seventy-three thousand, two hundred forty-nine".