1252400115 has 16 divisors (see below), whose sum is σ = 2121713568. Its totient is φ = 628655616.

The previous prime is 1252399999. The next prime is 1252400129. The reversal of 1252400115 is 5110042521.

It is not a de Polignac number, because 1252400115 - 2⁷ = 1252399987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1252400091 and 1252400100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2455432 + ... + 2455941.

It is an arithmetic number, because the mean of its divisors is an integer number (132607098).

Almost surely, 2^1252400115 is an apocalyptic number.

1252400115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1252400115 is a deficient number, since it is larger than the sum of its proper divisors (869313453).

1252400115 is a wasteful number, since it uses less digits than its factorization.

1252400115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4911398.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1252400115 is about 35389.2655334919. The cubic root of 1252400115 is about 1077.9063563510.

Adding to 1252400115 its reverse (5110042521), we get a palindrome (6362442636).

The spelling of 1252400115 in words is "one billion, two hundred fifty-two million, four hundred thousand, one hundred fifteen".