61415247 has 8 divisors (see below), whose sum is σ = 84528640. Its totient is φ = 39622680.

The previous prime is 61415219. The next prime is 61415273. The reversal of 61415247 is 74251416.

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

It is not a de Polignac number, because 61415247 - 2¹¹ = 61413199 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 (61415447) 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, 330097 + ... + 330282.

It is an arithmetic number, because the mean of its divisors is an integer number (10566080).

Almost surely, 2^61415247 is an apocalyptic number.

61415247 is a deficient number, since it is larger than the sum of its proper divisors (23113393).

61415247 is a wasteful number, since it uses less digits than its factorization.

61415247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660413.

The product of its digits is 6720, while the sum is 30.

The square root of 61415247 is about 7836.7880537884. The cubic root of 61415247 is about 394.5409333274.

The spelling of 61415247 in words is "sixty-one million, four hundred fifteen thousand, two hundred forty-seven".