1264237042 has 4 divisors (see below), whose sum is σ = 1896355566. Its totient is φ = 632118520.

The previous prime is 1264237033. The next prime is 1264237057. The reversal of 1264237042 is 2407324621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2407324621 = 13 ⋅185178817.

It can be written as a sum of positive squares in only one way, i.e., 1176421401 + 87815641 = 34299^2 + 9371^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1264236995 and 1264237013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316059259 + ... + 316059262.

Almost surely, 2^1264237042 is an apocalyptic number.

1264237042 is a deficient number, since it is larger than the sum of its proper divisors (632118524).

1264237042 is an equidigital number, since it uses as much as digits as its factorization.

1264237042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632118523.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 1264237042 is about 35556.1111765615. Note that the first 4 decimals coincide. The cubic root of 1264237042 is about 1081.2916194032.

The spelling of 1264237042 in words is "one billion, two hundred sixty-four million, two hundred thirty-seven thousand, forty-two".