70237481 has 4 divisors (see below), whose sum is σ = 70643652. Its totient is φ = 69831312.

The previous prime is 70237463. The next prime is 70237493. The reversal of 70237481 is 18473207.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18473207 = 449 ⋅41143.

It can be written as a sum of positive squares in 2 ways, for example, as 48930025 + 21307456 = 6995^2 + 4616^2 .

It is a cyclic number.

It is not a de Polignac number, because 70237481 - 2¹⁸ = 69975337 is a prime.

It is a super-2 number, since 2×70237481² = 9866607474450722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70237441) 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, 202826 + ... + 203171.

It is an arithmetic number, because the mean of its divisors is an integer number (17660913).

Almost surely, 2^70237481 is an apocalyptic number.

It is an amenable number.

70237481 is a deficient number, since it is larger than the sum of its proper divisors (406171).

70237481 is a wasteful number, since it uses less digits than its factorization.

70237481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406170.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 70237481 is about 8380.7804529173. The cubic root of 70237481 is about 412.5940643764.

It can be divided in two parts, 702 and 37481, that added together give a palindrome (38183).

The spelling of 70237481 in words is "seventy million, two hundred thirty-seven thousand, four hundred eighty-one".