1421554464 has 324 divisors, whose sum is σ = 4731135318. Its totient is φ = 404490240.

The previous prime is 1421554457. The next prime is 1421554469. The reversal of 1421554464 is 4644551241.

1421554464 = 172³ + 173³ + ... + 284³.

1421554464 is a `hidden beast` number, since 1 + 42 + 1 + 554 + 4 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1415264400 + 6290064 = 37620^2 + 2508^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421554469) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 12580072 + ... + 12580184.

Almost surely, 2^1421554464 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 1421554464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2365567659).

1421554464 is an abundant number, since it is smaller than the sum of its proper divisors (3309580854).

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

1421554464 is a wasteful number, since it uses less digits than its factorization.

1421554464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 148 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 1421554464 is about 37703.5073169593. The cubic root of 1421554464 is about 1124.4008566735.

The spelling of 1421554464 in words is "one billion, four hundred twenty-one million, five hundred fifty-four thousand, four hundred sixty-four".