1262225664 has 216 divisors, whose sum is σ = 4230687552. Its totient is φ = 354447360.

The previous prime is 1262225647. The next prime is 1262225683. The reversal of 1262225664 is 4665222621.

1262225664 is a `hidden beast` number, since 1 + 2 + 622 + 25 + 6 + 6 + 4 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 983167 + ... + 984449.

Almost surely, 2^1262225664 is an apocalyptic number.

1262225664 is a gapful number since it is divisible by the number (14) 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 1262225664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2115343776).

1262225664 is an abundant number, since it is smaller than the sum of its proper divisors (2968461888).

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

1262225664 is a wasteful number, since it uses less digits than its factorization.

1262225664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373 (or 1356 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 1262225664 is about 35527.8153564218. The cubic root of 1262225664 is about 1080.7178766307.

The spelling of 1262225664 in words is "one billion, two hundred sixty-two million, two hundred twenty-five thousand, six hundred sixty-four".