1252421534 has 16 divisors (see below), whose sum is σ = 2312163168. Its totient is φ = 495463392.

The previous prime is 1252421519. The next prime is 1252421539. The reversal of 1252421534 is 4351242521.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1252421497 and 1252421506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252421539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3440537 + ... + 3440900.

It is an arithmetic number, because the mean of its divisors is an integer number (144510198).

Almost surely, 2^1252421534 is an apocalyptic number.

1252421534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1252421534 is a deficient number, since it is larger than the sum of its proper divisors (1059741634).

1252421534 is a wasteful number, since it uses less digits than its factorization.

1252421534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6881459.

The product of its digits is 9600, while the sum is 29.

The square root of 1252421534 is about 35389.5681522112. The cubic root of 1252421534 is about 1077.9125012309.

The spelling of 1252421534 in words is "one billion, two hundred fifty-two million, four hundred twenty-one thousand, five hundred thirty-four".