1156402447 has 4 divisors (see below), whose sum is σ = 1157672736. Its totient is φ = 1155132160.

The previous prime is 1156402439. The next prime is 1156402451. The reversal of 1156402447 is 7442046511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7442046511 = 9437 ⋅788603.

It is a cyclic number.

It is not a de Polignac number, because 1156402447 - 2³ = 1156402439 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 (1156402427) 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, 633778 + ... + 635599.

It is an arithmetic number, because the mean of its divisors is an integer number (289418184).

Almost surely, 2^1156402447 is an apocalyptic number.

1156402447 is a deficient number, since it is larger than the sum of its proper divisors (1270289).

1156402447 is an equidigital number, since it uses as much as digits as its factorization.

1156402447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270288.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 1156402447 is about 34005.9178232260. The cubic root of 1156402447 is about 1049.6302392662.

Adding to 1156402447 its reverse (7442046511), we get a palindrome (8598448958).

The spelling of 1156402447 in words is "one billion, one hundred fifty-six million, four hundred two thousand, four hundred forty-seven".