1262542420 has 48 divisors (see below), whose sum is σ = 2684577168. Its totient is φ = 498713600.

The previous prime is 1262542399. The next prime is 1262542429. The reversal of 1262542420 is 242452621.

It can be written as a sum of positive squares in 8 ways, for example, as 244421956 + 1018120464 = 15634^2 + 31908^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1262542429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1245834 + ... + 1246846.

It is an arithmetic number, because the mean of its divisors is an integer number (55928691).

Almost surely, 2^1262542420 is an apocalyptic number.

1262542420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1262542420 is an abundant number, since it is smaller than the sum of its proper divisors (1422034748).

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

1262542420 is a wasteful number, since it uses less digits than its factorization.

1262542420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1262542420 is about 35532.2729360225. The cubic root of 1262542420 is about 1080.8082712540.

The spelling of 1262542420 in words is "one billion, two hundred sixty-two million, five hundred forty-two thousand, four hundred twenty".