1254137540 has 12 divisors (see below), whose sum is σ = 2633688876. Its totient is φ = 501655008.

The previous prime is 1254137513. The next prime is 1254137543. The reversal of 1254137540 is 457314521.

It can be written as a sum of positive squares in 2 ways, for example, as 561500416 + 692637124 = 23696^2 + 26318^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1254137497 and 1254137506.

It is not an unprimeable number, because it can be changed into a prime (1254137543) 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 3 ways as a sum of consecutive naturals, for example, 31353419 + ... + 31353458.

It is an arithmetic number, because the mean of its divisors is an integer number (219474073).

Almost surely, 2^1254137540 is an apocalyptic number.

1254137540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1254137540 is an abundant number, since it is smaller than the sum of its proper divisors (1379551336).

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

1254137540 is a wasteful number, since it uses less digits than its factorization.

1254137540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62706886 (or 62706884 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 1254137540 is about 35413.8043706123. The cubic root of 1254137540 is about 1078.4045773465.

The spelling of 1254137540 in words is "one billion, two hundred fifty-four million, one hundred thirty-seven thousand, five hundred forty".