1293991452 has 36 divisors (see below), whose sum is σ = 3522533560. Its totient is φ = 398151072.

The previous prime is 1293991427. The next prime is 1293991453. The reversal of 1293991452 is 2541993921.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 1293991398 and 1293991407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1293991453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1382002 + ... + 1382937.

Almost surely, 2^1293991452 is an apocalyptic number.

1293991452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1293991452 is an abundant number, since it is smaller than the sum of its proper divisors (2228542108).

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

1293991452 is a wasteful number, since it uses less digits than its factorization.

1293991452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764962 (or 2764957 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 1293991452 is about 35972.0926830786. The cubic root of 1293991452 is about 1089.7088277614.

The spelling of 1293991452 in words is "one billion, two hundred ninety-three million, nine hundred ninety-one thousand, four hundred fifty-two".