70545481 has 4 divisors (see below), whose sum is σ = 71272852. Its totient is φ = 69818112.

The previous prime is 70545469. The next prime is 70545493. The reversal of 70545481 is 18454507.

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

It is an interprime number because it is at equal distance from previous prime (70545469) and next prime (70545493).

It can be written as a sum of positive squares in 2 ways, for example, as 56550400 + 13995081 = 7520^2 + 3741^2 .

It is a cyclic number.

It is not a de Polignac number, because 70545481 - 2²³ = 62156873 is a prime.

It is a super-2 number, since 2×70545481² = 9953329779042722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70545401) 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, 363540 + ... + 363733.

It is an arithmetic number, because the mean of its divisors is an integer number (17818213).

Almost surely, 2^70545481 is an apocalyptic number.

It is an amenable number.

70545481 is a deficient number, since it is larger than the sum of its proper divisors (727371).

70545481 is an equidigital number, since it uses as much as digits as its factorization.

70545481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727370.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 70545481 is about 8399.1357293474. The cubic root of 70545481 is about 413.1962768937.

Adding to 70545481 its reverse (18454507), we get a palindrome (88999988).

The spelling of 70545481 in words is "seventy million, five hundred forty-five thousand, four hundred eighty-one".