421120451 has 2 divisors, whose sum is σ = 421120452. Its totient is φ = 421120450.

The previous prime is 421120439. The next prime is 421120463. The reversal of 421120451 is 154021124.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (421120439) and next prime (421120463).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421120451 is a prime.

It is not a weakly prime, because it can be changed into another prime (421125451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210560225 + 210560226.

It is an arithmetic number, because the mean of its divisors is an integer number (210560226).

Almost surely, 2^421120451 is an apocalyptic number.

421120451 is a deficient number, since it is larger than the sum of its proper divisors (1).

421120451 is an equidigital number, since it uses as much as digits as its factorization.

421120451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 421120451 is about 20521.2195300377. The cubic root of 421120451 is about 749.5525930076.

Adding to 421120451 its reverse (154021124), we get a palindrome (575141575).

The spelling of 421120451 in words is "four hundred twenty-one million, one hundred twenty thousand, four hundred fifty-one".