70421291 has 2 divisors, whose sum is σ = 70421292. Its totient is φ = 70421290.

The previous prime is 70421287. The next prime is 70421317. The reversal of 70421291 is 19212407.

It is an a-pointer prime, because the next prime (70421317) can be obtained adding 70421291 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70421291 - 2² = 70421287 is a prime.

It is a super-2 number, since 2×70421291² = 9918316452213362, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70421291.

It is not a weakly prime, because it can be changed into another prime (70441291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35210645 + 35210646.

It is an arithmetic number, because the mean of its divisors is an integer number (35210646).

Almost surely, 2^70421291 is an apocalyptic number.

70421291 is a deficient number, since it is larger than the sum of its proper divisors (1).

70421291 is an equidigital number, since it uses as much as digits as its factorization.

70421291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 70421291 is about 8391.7394501974. The cubic root of 70421291 is about 412.9536675096.

Adding to 70421291 its reverse (19212407), we get a palindrome (89633698).

The spelling of 70421291 in words is "seventy million, four hundred twenty-one thousand, two hundred ninety-one".