1421742451 has 2 divisors, whose sum is σ = 1421742452. Its totient is φ = 1421742450.

The previous prime is 1421742403. The next prime is 1421742473. The reversal of 1421742451 is 1542471241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1421742451 - 2⁷ = 1421742323 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421742251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710871225 + 710871226.

It is an arithmetic number, because the mean of its divisors is an integer number (710871226).

Almost surely, 2^1421742451 is an apocalyptic number.

1421742451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421742451 is an equidigital number, since it uses as much as digits as its factorization.

1421742451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 31.

The square root of 1421742451 is about 37706.0001989073. Note that the first 3 decimals coincide. The cubic root of 1421742451 is about 1124.4504182468.

The spelling of 1421742451 in words is "one billion, four hundred twenty-one million, seven hundred forty-two thousand, four hundred fifty-one".