70421512 has 64 divisors (see below), whose sum is σ = 157996800. Its totient is φ = 28788480.

The previous prime is 70421503. The next prime is 70421513. The reversal of 70421512 is 21512407.

It is a happy number.

It is a super-2 number, since 2×70421512² = 9918378704732288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70421513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167062 + ... + 167482.

It is an arithmetic number, because the mean of its divisors is an integer number (2468700).

Almost surely, 2^70421512 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 70421512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78998400).

70421512 is an abundant number, since it is smaller than the sum of its proper divisors (87575288).

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

70421512 is a wasteful number, since it uses less digits than its factorization.

70421512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 70421512 is about 8391.7526178981. The cubic root of 70421512 is about 412.9540994939.

Adding to 70421512 its reverse (21512407), we get a palindrome (91933919).

The spelling of 70421512 in words is "seventy million, four hundred twenty-one thousand, five hundred twelve".