70291481 has 16 divisors (see below), whose sum is σ = 81267984. Its totient is φ = 60217344.

The previous prime is 70291433. The next prime is 70291483. The reversal of 70291481 is 18419207.

70291481 = 454² + 455² + ... + 672².

It can be written as a sum of positive squares in 8 ways, for example, as 8904256 + 61387225 = 2984^2 + 7835^2 .

It is a cyclic number.

It is not a de Polignac number, because 70291481 - 2¹⁰ = 70290457 is a prime.

It is a super-2 number, since 2×70291481² = 9881784602346722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70291483) 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, 13955 + ... + 18311.

It is an arithmetic number, because the mean of its divisors is an integer number (5079249).

Almost surely, 2^70291481 is an apocalyptic number.

It is an amenable number.

70291481 is a deficient number, since it is larger than the sum of its proper divisors (10976503).

70291481 is a wasteful number, since it uses less digits than its factorization.

70291481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 70291481 is about 8384.0014909350. The cubic root of 70291481 is about 412.6997741855.

The spelling of 70291481 in words is "seventy million, two hundred ninety-one thousand, four hundred eighty-one".