1421507951 has 2 divisors, whose sum is σ = 1421507952. Its totient is φ = 1421507950.

The previous prime is 1421507917. The next prime is 1421507953. The reversal of 1421507951 is 1597051241.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1597051241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421507951 - 2¹⁸ = 1421245807 is a prime.

Together with 1421507953, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421507953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710753975 + 710753976.

It is an arithmetic number, because the mean of its divisors is an integer number (710753976).

Almost surely, 2^1421507951 is an apocalyptic number.

1421507951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421507951 is an equidigital number, since it uses as much as digits as its factorization.

1421507951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 1421507951 is about 37702.8904860092. The cubic root of 1421507951 is about 1124.3885931435.

The spelling of 1421507951 in words is "one billion, four hundred twenty-one million, five hundred seven thousand, nine hundred fifty-one".