1262540400 has 240 divisors, whose sum is σ = 4460393088. Its totient is φ = 302720000.

The previous prime is 1262540399. The next prime is 1262540407. The reversal of 1262540400 is 40452621.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1262540407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1332727 + ... + 1333673.

Almost surely, 2^1262540400 is an apocalyptic number.

1262540400 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 1262540400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2230196544).

1262540400 is an abundant number, since it is smaller than the sum of its proper divisors (3197852688).

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

1262540400 is a wasteful number, since it uses less digits than its factorization.

1262540400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080 (or 1069 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1262540400 is about 35532.2445111479. The cubic root of 1262540400 is about 1080.8076948420.

The spelling of 1262540400 in words is "one billion, two hundred sixty-two million, five hundred forty thousand, four hundred".