1253320042 has 16 divisors (see below), whose sum is σ = 2025714600. Its totient is φ = 578135232.

The previous prime is 1253320039. The next prime is 1253320073. The reversal of 1253320042 is 2400233521.

It can be written as a sum of positive squares in 4 ways, for example, as 728406121 + 524913921 = 26989^2 + 22911^2 .

It is a super-2 number, since 2×1253320042² = 3141622255357763528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1253319995 and 1253320022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38308 + ... + 63040.

Almost surely, 2^1253320042 is an apocalyptic number.

1253320042 is a deficient number, since it is larger than the sum of its proper divisors (772394558).

1253320042 is a wasteful number, since it uses less digits than its factorization.

1253320042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26697.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 1253320042 is about 35402.2604080587. The cubic root of 1253320042 is about 1078.1702103867.

Adding to 1253320042 its reverse (2400233521), we get a palindrome (3653553563).

The spelling of 1253320042 in words is "one billion, two hundred fifty-three million, three hundred twenty thousand, forty-two".