1252167440 has 20 divisors (see below), whose sum is σ = 2911289484. Its totient is φ = 500866944.

The previous prime is 1252167401. The next prime is 1252167457. The reversal of 1252167440 is 447612521.

It can be written as a sum of positive squares in 2 ways, for example, as 784224016 + 467943424 = 28004^2 + 21632^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1252167397 and 1252167406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7825967 + ... + 7826126.

Almost surely, 2^1252167440 is an apocalyptic number.

1252167440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252167440 is an abundant number, since it is smaller than the sum of its proper divisors (1659122044).

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

1252167440 is a wasteful number, since it uses less digits than its factorization.

1252167440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15652106 (or 15652100 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 1252167440 is about 35385.9780138970. The cubic root of 1252167440 is about 1077.8395998910.

Adding to 1252167440 its reverse (447612521), we get a palindrome (1699779961).

The spelling of 1252167440 in words is "one billion, two hundred fifty-two million, one hundred sixty-seven thousand, four hundred forty".