61601257 has 4 divisors (see below), whose sum is σ = 61649280. Its totient is φ = 61553236.

The previous prime is 61601231. The next prime is 61601279. The reversal of 61601257 is 75210616.

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 a de Polignac number, because none of the positive numbers 2^k-61601257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61601227) 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, 22033 + ... + 24670.

It is an arithmetic number, because the mean of its divisors is an integer number (15412320).

Almost surely, 2^61601257 is an apocalyptic number.

It is an amenable number.

61601257 is a deficient number, since it is larger than the sum of its proper divisors (48023).

61601257 is a wasteful number, since it uses less digits than its factorization.

61601257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48022.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 61601257 is about 7848.6468260459. The cubic root of 61601257 is about 394.9388507595.

The spelling of 61601257 in words is "sixty-one million, six hundred one thousand, two hundred fifty-seven".