61301257 has 4 divisors (see below), whose sum is σ = 61843860. Its totient is φ = 60758656.

The previous prime is 61301237. The next prime is 61301281. The reversal of 61301257 is 75210316.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11964681 + 49336576 = 3459^2 + 7024^2 .

It is a cyclic number.

It is not a de Polignac number, because 61301257 - 2¹⁵ = 61268489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61301237) 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, 271132 + ... + 271357.

It is an arithmetic number, because the mean of its divisors is an integer number (15460965).

Almost surely, 2^61301257 is an apocalyptic number.

It is an amenable number.

61301257 is a deficient number, since it is larger than the sum of its proper divisors (542603).

61301257 is a wasteful number, since it uses less digits than its factorization.

61301257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542602.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 61301257 is about 7829.5119260398. The cubic root of 61301257 is about 394.2966857588.

The spelling of 61301257 in words is "sixty-one million, three hundred one thousand, two hundred fifty-seven".