61725157 has 8 divisors (see below), whose sum is σ = 67466336. Its totient is φ = 56125872.

The previous prime is 61725143. The next prime is 61725173. The reversal of 61725157 is 75152716.

It is a happy number.

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 61725157 - 2⁷ = 61725029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61725127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34563 + ... + 36304.

It is an arithmetic number, because the mean of its divisors is an integer number (8433292).

Almost surely, 2^61725157 is an apocalyptic number.

61725157 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

61725157 is a deficient number, since it is larger than the sum of its proper divisors (5741179).

61725157 is a wasteful number, since it uses less digits than its factorization.

61725157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70947.

The product of its digits is 14700, while the sum is 34.

The square root of 61725157 is about 7856.5359414948. The cubic root of 61725157 is about 395.2034565807.

The spelling of 61725157 in words is "sixty-one million, seven hundred twenty-five thousand, one hundred fifty-seven".