61751245 has 4 divisors (see below), whose sum is σ = 74101500. Its totient is φ = 49400992.

The previous prime is 61751233. The next prime is 61751257. The reversal of 61751245 is 54215716.

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 (61751233) and next prime (61751257).

It can be written as a sum of positive squares in 2 ways, for example, as 31214569 + 30536676 = 5587^2 + 5526^2 .

It is a cyclic number.

It is not a de Polignac number, because 61751245 - 2⁵ = 61751213 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent 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, 6175120 + ... + 6175129.

It is an arithmetic number, because the mean of its divisors is an integer number (18525375).

Almost surely, 2^61751245 is an apocalyptic number.

It is an amenable number.

61751245 is a deficient number, since it is larger than the sum of its proper divisors (12350255).

61751245 is a wasteful number, since it uses less digits than its factorization.

61751245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12350254.

The product of its digits is 8400, while the sum is 31.

The square root of 61751245 is about 7858.1960398046. The cubic root of 61751245 is about 395.2591260252.

The spelling of 61751245 in words is "sixty-one million, seven hundred fifty-one thousand, two hundred forty-five".