70121232 has 60 divisors (see below), whose sum is σ = 197308800. Its totient is φ = 23246784.

The previous prime is 70121221. The next prime is 70121237. The reversal of 70121232 is 23212107.

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

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (70121237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27433 + ... + 29879.

It is an arithmetic number, because the mean of its divisors is an integer number (3288480).

Almost surely, 2^70121232 is an apocalyptic number.

70121232 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70121232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98654400).

70121232 is an abundant number, since it is smaller than the sum of its proper divisors (127187568).

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

70121232 is a wasteful number, since it uses less digits than its factorization.

70121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660 (or 2651 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 70121232 is about 8373.8421289155. The cubic root of 70121232 is about 412.3663126007.

Adding to 70121232 its reverse (23212107), we get a palindrome (93333339).

The spelling of 70121232 in words is "seventy million, one hundred twenty-one thousand, two hundred thirty-two".