61129212 has 24 divisors (see below), whose sum is σ = 151025616. Its totient is φ = 19177728.

The previous prime is 61129171. The next prime is 61129253. The reversal of 61129212 is 21292116.

It is an interprime number because it is at equal distance from previous prime (61129171) and next prime (61129253).

It is a zygodrome in base 5.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149623 + ... + 150030.

It is an arithmetic number, because the mean of its divisors is an integer number (6292734).

Almost surely, 2^61129212 is an apocalyptic number.

It is an amenable number.

61129212 is an abundant number, since it is smaller than the sum of its proper divisors (89896404).

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

61129212 is a wasteful number, since it uses less digits than its factorization.

61129212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299677 (or 299675 counting only the distinct ones).

The product of its digits is 432, while the sum is 24.

The square root of 61129212 is about 7818.5172507324. The cubic root of 61129212 is about 393.9274691055.

The spelling of 61129212 in words is "sixty-one million, one hundred twenty-nine thousand, two hundred twelve".