1247455000 has 160 divisors (see below), whose sum is σ = 3280012560. Its totient is φ = 440640000.

The previous prime is 1247454997. The next prime is 1247455009. The reversal of 1247455000 is 5547421.

It is a super-2 number, since 2×1247455000² = 3112287954050000000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1247455000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247455009) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2034694 + ... + 2035306.

Almost surely, 2^1247455000 is an apocalyptic number.

1247455000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1247455000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1640006280).

1247455000 is an abundant number, since it is smaller than the sum of its proper divisors (2032557560).

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

1247455000 is a wasteful number, since it uses less digits than its factorization.

1247455000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 1247455000 is about 35319.3289856985. The cubic root of 1247455000 is about 1076.4857767953.

The spelling of 1247455000 in words is "one billion, two hundred forty-seven million, four hundred fifty-five thousand".