61406250 has 64 divisors (see below), whose sum is σ = 154687104. Its totient is φ = 16250000.

The previous prime is 61406249. The next prime is 61406263. The reversal of 61406250 is 5260416.

It is a self number, because there is not a number n which added to its sum of digits gives 61406250.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468685 + ... + 468815.

It is an arithmetic number, because the mean of its divisors is an integer number (2416986).

Almost surely, 2^61406250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61406250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77343552).

61406250 is an abundant number, since it is smaller than the sum of its proper divisors (93280854).

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

61406250 is an frugal number, since it uses more digits than its factorization.

61406250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 61406250 is about 7836.2140093287. The cubic root of 61406250 is about 394.5216663522.

Adding to 61406250 its reverse (5260416), we get a palindrome (66666666).

The spelling of 61406250 in words is "sixty-one million, four hundred six thousand, two hundred fifty".