1125311402 has 4 divisors (see below), whose sum is σ = 1687967106. Its totient is φ = 562655700.

The previous prime is 1125311401. The next prime is 1125311417. The reversal of 1125311402 is 2041135211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2041135211 = 19 ⋅107428169.

It can be written as a sum of positive squares in only one way, i.e., 1000520161 + 124791241 = 31631^2 + 11171^2 .

It is not an unprimeable number, because it can be changed into a prime (1125311401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281327849 + ... + 281327852.

Almost surely, 2^1125311402 is an apocalyptic number.

1125311402 is a deficient number, since it is larger than the sum of its proper divisors (562655704).

1125311402 is an equidigital number, since it uses as much as digits as its factorization.

1125311402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562655703.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1125311402 is about 33545.6614482410. The cubic root of 1125311402 is about 1040.1378644899.

Adding to 1125311402 its reverse (2041135211), we get a palindrome (3166446613).

The spelling of 1125311402 in words is "one billion, one hundred twenty-five million, three hundred eleven thousand, four hundred two".