70187421 has 8 divisors (see below), whose sum is σ = 97652160. Its totient is φ = 44757152.

The previous prime is 70187419. The next prime is 70187437. The reversal of 70187421 is 12478107.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70187421 - 2¹ = 70187419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70187401) 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, 508536 + ... + 508673.

It is an arithmetic number, because the mean of its divisors is an integer number (12206520).

Almost surely, 2^70187421 is an apocalyptic number.

It is an amenable number.

70187421 is a deficient number, since it is larger than the sum of its proper divisors (27464739).

70187421 is a wasteful number, since it uses less digits than its factorization.

70187421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017235.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 70187421 is about 8377.7933252140. The cubic root of 70187421 is about 412.4960190617.

The spelling of 70187421 in words is "seventy million, one hundred eighty-seven thousand, four hundred twenty-one".