70287421 has 2 divisors, whose sum is σ = 70287422. Its totient is φ = 70287420.

The previous prime is 70287377. The next prime is 70287491. The reversal of 70287421 is 12478207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48804196 + 21483225 = 6986^2 + 4635^2 .

It is a cyclic number.

It is not a de Polignac number, because 70287421 - 2⁷ = 70287293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70287491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35143710 + 35143711.

It is an arithmetic number, because the mean of its divisors is an integer number (35143711).

Almost surely, 2^70287421 is an apocalyptic number.

It is an amenable number.

70287421 is a deficient number, since it is larger than the sum of its proper divisors (1).

70287421 is an equidigital number, since it uses as much as digits as its factorization.

70287421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 70287421 is about 8383.7593596190. The cubic root of 70287421 is about 412.6918282565.

The spelling of 70287421 in words is "seventy million, two hundred eighty-seven thousand, four hundred twenty-one".