1021254154540 has 24 divisors (see below), whose sum is σ = 2257509184560. Its totient is φ = 387001574208.

The previous prime is 1021254154523. The next prime is 1021254154567. The reversal of 1021254154540 is 454514521201.

It is a super-2 number, since 2×1021254154540² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021254154496 and 1021254154505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1343755087 + ... + 1343755846.

It is an arithmetic number, because the mean of its divisors is an integer number (94062882690).

Almost surely, 2^{1021254154540} is an apocalyptic number.

1021254154540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021254154540 is an abundant number, since it is smaller than the sum of its proper divisors (1236255030020).

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

1021254154540 is a wasteful number, since it uses less digits than its factorization.

1021254154540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687510961 (or 2687510959 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 34.

Adding to 1021254154540 its reverse (454514521201), we get a palindrome (1475768675741).

The spelling of 1021254154540 in words is "one trillion, twenty-one billion, two hundred fifty-four million, one hundred fifty-four thousand, five hundred forty".