61201940 has 12 divisors (see below), whose sum is σ = 128524116. Its totient is φ = 24480768.

The previous prime is 61201901. The next prime is 61201949. The reversal of 61201940 is 4910216.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14032516 + 47169424 = 3746^2 + 6868^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61201949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530029 + ... + 1530068.

It is an arithmetic number, because the mean of its divisors is an integer number (10710343).

Almost surely, 2^61201940 is an apocalyptic number.

It is an amenable number.

61201940 is an abundant number, since it is smaller than the sum of its proper divisors (67322176).

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

61201940 is a wasteful number, since it uses less digits than its factorization.

61201940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3060106 (or 3060104 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 61201940 is about 7823.1668779338. The cubic root of 61201940 is about 394.0836312288.

The spelling of 61201940 in words is "sixty-one million, two hundred one thousand, nine hundred forty".