61257065 has 8 divisors (see below), whose sum is σ = 73551240. Its totient is φ = 48977152.

The previous prime is 61257059. The next prime is 61257067. The reversal of 61257065 is 56075216.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12201049 + 49056016 = 3493^2 + 7004^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61257065 - 2¹² = 61252969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61257067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12371 + ... + 16599.

It is an arithmetic number, because the mean of its divisors is an integer number (9193905).

Almost surely, 2^61257065 is an apocalyptic number.

It is an amenable number.

61257065 is a deficient number, since it is larger than the sum of its proper divisors (12294175).

61257065 is a wasteful number, since it uses less digits than its factorization.

61257065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7131.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 61257065 is about 7826.6892745273. The cubic root of 61257065 is about 394.2019136512.

The spelling of 61257065 in words is "sixty-one million, two hundred fifty-seven thousand, sixty-five".