1421522451 has 12 divisors (see below), whose sum is σ = 2083957512. Its totient is φ = 933536736.

The previous prime is 1421522413. The next prime is 1421522461. The reversal of 1421522451 is 1542251241.

It is a happy number.

It is not a de Polignac number, because 1421522451 - 2⁹ = 1421521939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421522461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1178106 + ... + 1179311.

It is an arithmetic number, because the mean of its divisors is an integer number (173663126).

Almost surely, 2^1421522451 is an apocalyptic number.

1421522451 is a deficient number, since it is larger than the sum of its proper divisors (662435061).

1421522451 is a wasteful number, since it uses less digits than its factorization.

1421522451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357490 (or 2357487 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1421522451 is about 37703.0827784679. The cubic root of 1421522451 is about 1124.3924162149.

Adding to 1421522451 its reverse (1542251241), we get a palindrome (2963773692).

The spelling of 1421522451 in words is "one billion, four hundred twenty-one million, five hundred twenty-two thousand, four hundred fifty-one".