1152621247 has 4 divisors (see below), whose sum is σ = 1152761320. Its totient is φ = 1152481176.

The previous prime is 1152621229. The next prime is 1152621251. The reversal of 1152621247 is 7421262511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7421262511 = 13 ⋅570866347.

It is a cyclic number.

It is not a de Polignac number, because 1152621247 - 2¹¹ = 1152619199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152621257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56868 + ... + 74425.

It is an arithmetic number, because the mean of its divisors is an integer number (288190330).

Almost surely, 2^1152621247 is an apocalyptic number.

1152621247 is a deficient number, since it is larger than the sum of its proper divisors (140073).

1152621247 is an equidigital number, since it uses as much as digits as its factorization.

1152621247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140072.

The product of its digits is 6720, while the sum is 31.

The square root of 1152621247 is about 33950.2760960791. The cubic root of 1152621247 is about 1048.4849645292.

Adding to 1152621247 its reverse (7421262511), we get a palindrome (8573883758).

The spelling of 1152621247 in words is "one billion, one hundred fifty-two million, six hundred twenty-one thousand, two hundred forty-seven".