69121472 has 56 divisors (see below), whose sum is σ = 157605984. Its totient is φ = 29463552.

The previous prime is 69121469. The next prime is 69121477. The reversal of 69121472 is 27412196.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69121477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123818 + ... + 124374.

Almost surely, 2^69121472 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 69121472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78802992).

69121472 is an abundant number, since it is smaller than the sum of its proper divisors (88484512).

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

69121472 is a wasteful number, since it uses less digits than its factorization.

69121472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853 (or 843 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 69121472 is about 8313.9324029006. The cubic root of 69121472 is about 410.3971404741.

The spelling of 69121472 in words is "sixty-nine million, one hundred twenty-one thousand, four hundred seventy-two".