1421511448 has 128 divisors (see below), whose sum is σ = 3361996800. Its totient is φ = 549763200.

The previous prime is 1421511383. The next prime is 1421511503. The reversal of 1421511448 is 8441151241.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2341561 + ... + 2342167.

It is an arithmetic number, because the mean of its divisors is an integer number (26265600).

Almost surely, 2^1421511448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421511448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1680998400).

1421511448 is an abundant number, since it is smaller than the sum of its proper divisors (1940485352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421511448 is a wasteful number, since it uses less digits than its factorization.

1421511448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 737 counting only the distinct ones).

The product of its digits is 5120, while the sum is 31.

The square root of 1421511448 is about 37702.9368617353. The cubic root of 1421511448 is about 1124.3895151652.

Adding to 1421511448 its reverse (8441151241), we get a palindrome (9862662689).

The spelling of 1421511448 in words is "one billion, four hundred twenty-one million, five hundred eleven thousand, four hundred forty-eight".