1421247264 has 24 divisors (see below), whose sum is σ = 3730774320. Its totient is φ = 473749056.

The previous prime is 1421247229. The next prime is 1421247271. The reversal of 1421247264 is 4627421241.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7402234 + ... + 7402425.

It is an arithmetic number, because the mean of its divisors is an integer number (155448930).

Almost surely, 2^1421247264 is an apocalyptic number.

It is an amenable number.

1421247264 is an abundant number, since it is smaller than the sum of its proper divisors (2309527056).

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

1421247264 is a wasteful number, since it uses less digits than its factorization.

1421247264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14804672 (or 14804664 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 1421247264 is about 37699.4332052884. The cubic root of 1421247264 is about 1124.3198559482.

The spelling of 1421247264 in words is "one billion, four hundred twenty-one million, two hundred forty-seven thousand, two hundred sixty-four".