1252140045 has 16 divisors (see below), whose sum is σ = 2157533952. Its totient is φ = 616438080.

The previous prime is 1252140031. The next prime is 1252140059. The reversal of 1252140045 is 5400412521.

It is an interprime number because it is at equal distance from previous prime (1252140031) and next prime (1252140059).

It is not a de Polignac number, because 1252140045 - 2¹² = 1252135949 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1252139997 and 1252140024.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3210421 + ... + 3210810.

It is an arithmetic number, because the mean of its divisors is an integer number (134845872).

Almost surely, 2^1252140045 is an apocalyptic number.

1252140045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1252140045 is a deficient number, since it is larger than the sum of its proper divisors (905393907).

1252140045 is a wasteful number, since it uses less digits than its factorization.

1252140045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6421252.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1252140045 is about 35385.5909234253. The cubic root of 1252140045 is about 1077.8317394856.

Adding to 1252140045 its reverse (5400412521), we get a palindrome (6652552566).

The spelling of 1252140045 in words is "one billion, two hundred fifty-two million, one hundred forty thousand, forty-five".