61001172 has 72 divisors (see below), whose sum is σ = 164105760. Its totient is φ = 19051200.

The previous prime is 61001167. The next prime is 61001183. The reversal of 61001172 is 27110016.

It is a super-2 number, since 2×61001172² = 7442285970747168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68643 + ... + 69525.

Almost surely, 2^61001172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61001172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82052880).

61001172 is an abundant number, since it is smaller than the sum of its proper divisors (103104588).

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

61001172 is a wasteful number, since it uses less digits than its factorization.

61001172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 61001172 is about 7810.3247051579. The cubic root of 61001172 is about 393.6522393731.

Adding to 61001172 its reverse (27110016), we get a palindrome (88111188).

The spelling of 61001172 in words is "sixty-one million, one thousand, one hundred seventy-two".