61497270 has 24 divisors (see below), whose sum is σ = 159893136. Its totient is φ = 16399248.

The previous prime is 61497257. The next prime is 61497299. The reversal of 61497270 is 7279416.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 341562 + ... + 341741.

It is an arithmetic number, because the mean of its divisors is an integer number (6662214).

Almost surely, 2^61497270 is an apocalyptic number.

61497270 is an abundant number, since it is smaller than the sum of its proper divisors (98395866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61497270 is a wasteful number, since it uses less digits than its factorization.

61497270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683316 (or 683313 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 61497270 is about 7842.0195103047. The cubic root of 61497270 is about 394.7164979550.

The spelling of 61497270 in words is "sixty-one million, four hundred ninety-seven thousand, two hundred seventy".