70434521 has 4 divisors (see below), whose sum is σ = 70823844. Its totient is φ = 70045200.

The previous prime is 70434499. The next prime is 70434523. The reversal of 70434521 is 12543407.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5470921 + 64963600 = 2339^2 + 8060^2 .

It is a cyclic number.

It is not a de Polignac number, because 70434521 - 2²⁶ = 3325657 is a prime.

It is a super-2 number, since 2×70434521² = 9922043496998882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70434523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194390 + ... + 194751.

It is an arithmetic number, because the mean of its divisors is an integer number (17705961).

Almost surely, 2^70434521 is an apocalyptic number.

It is an amenable number.

70434521 is a deficient number, since it is larger than the sum of its proper divisors (389323).

70434521 is a wasteful number, since it uses less digits than its factorization.

70434521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389322.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 70434521 is about 8392.5276883666. The cubic root of 70434521 is about 412.9795263318.

Adding to 70434521 its reverse (12543407), we get a palindrome (82977928).

The spelling of 70434521 in words is "seventy million, four hundred thirty-four thousand, five hundred twenty-one".