1253540071 has 4 divisors (see below), whose sum is σ = 1432617232. Its totient is φ = 1074462912.

The previous prime is 1253540063. The next prime is 1253540077. The reversal of 1253540071 is 1700453521.

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: 1700453521 = 13 ⋅130804117.

It is a cyclic number.

It is not a de Polignac number, because 1253540071 - 2³ = 1253540063 is a prime.

It is a super-3 number, since 3×1253540071³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253540077) 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, 89538570 + ... + 89538583.

It is an arithmetic number, because the mean of its divisors is an integer number (358154308).

Almost surely, 2^1253540071 is an apocalyptic number.

1253540071 is a deficient number, since it is larger than the sum of its proper divisors (179077161).

1253540071 is an equidigital number, since it uses as much as digits as its factorization.

1253540071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179077160.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 1253540071 is about 35405.3678274919. The cubic root of 1253540071 is about 1078.2333001069.

Adding to 1253540071 its reverse (1700453521), we get a palindrome (2953993592).

The spelling of 1253540071 in words is "one billion, two hundred fifty-three million, five hundred forty thousand, seventy-one".