1421465251 has 16 divisors (see below), whose sum is σ = 1572480000. Its totient is φ = 1278085248.

The previous prime is 1421465237. The next prime is 1421465261. The reversal of 1421465251 is 1525641241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1421465251 - 2¹¹ = 1421463203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421465231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404500 + ... + 407998.

It is an arithmetic number, because the mean of its divisors is an integer number (98280000).

Almost surely, 2^1421465251 is an apocalyptic number.

1421465251 is a deficient number, since it is larger than the sum of its proper divisors (151014749).

1421465251 is a wasteful number, since it uses less digits than its factorization.

1421465251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4578.

The product of its digits is 9600, while the sum is 31.

The square root of 1421465251 is about 37702.3242121756. The cubic root of 1421465251 is about 1124.3773347064.

The spelling of 1421465251 in words is "one billion, four hundred twenty-one million, four hundred sixty-five thousand, two hundred fifty-one".