72061146 has 12 divisors (see below), whose sum is σ = 156132522. Its totient is φ = 24020376.

The previous prime is 72061141. The next prime is 72061151. The reversal of 72061146 is 64116027.

72061146 is a `hidden beast` number, since 7 + 2 + 0 + 611 + 46 = 666.

It is an interprime number because it is at equal distance from previous prime (72061141) and next prime (72061151).

It can be written as a sum of positive squares in only one way, i.e., 39125025 + 32936121 = 6255^2 + 5739^2 .

It is not an unprimeable number, because it can be changed into a prime (72061141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2001681 + ... + 2001716.

Almost surely, 2^72061146 is an apocalyptic number.

72061146 is an abundant number, since it is smaller than the sum of its proper divisors (84071376).

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

72061146 is a wasteful number, since it uses less digits than its factorization.

72061146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003405 (or 4003402 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 72061146 is about 8488.8836721915. The cubic root of 72061146 is about 416.1344987006.

The spelling of 72061146 in words is "seventy-two million, sixty-one thousand, one hundred forty-six".