61858257 has 8 divisors (see below), whose sum is σ = 87329376. Its totient is φ = 38812992.

The previous prime is 61858241. The next prime is 61858259. The reversal of 61858257 is 75285816.

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

It is not a de Polignac number, because 61858257 - 2⁴ = 61858241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61858259) 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, 606403 + ... + 606504.

It is an arithmetic number, because the mean of its divisors is an integer number (10916172).

Almost surely, 2^61858257 is an apocalyptic number.

It is an amenable number.

61858257 is a deficient number, since it is larger than the sum of its proper divisors (25471119).

61858257 is a wasteful number, since it uses less digits than its factorization.

61858257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212927.

The product of its digits is 134400, while the sum is 42.

The square root of 61858257 is about 7865.0020343290. The cubic root of 61858257 is about 395.4873160798.

The spelling of 61858257 in words is "sixty-one million, eight hundred fifty-eight thousand, two hundred fifty-seven".