70420451 has 2 divisors, whose sum is σ = 70420452. Its totient is φ = 70420450.

The previous prime is 70420433. The next prime is 70420459. The reversal of 70420451 is 15402407.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70420451 - 2¹⁸ = 70158307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70420459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35210225 + 35210226.

It is an arithmetic number, because the mean of its divisors is an integer number (35210226).

Almost surely, 2^70420451 is an apocalyptic number.

70420451 is a deficient number, since it is larger than the sum of its proper divisors (1).

70420451 is an equidigital number, since it uses as much as digits as its factorization.

70420451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 70420451 is about 8391.6894008298. The cubic root of 70420451 is about 412.9520255703.

Adding to 70420451 its reverse (15402407), we get a palindrome (85822858).

The spelling of 70420451 in words is "seventy million, four hundred twenty thousand, four hundred fifty-one".