1253526690 has 32 divisors (see below), whose sum is σ = 3239885376. Its totient is φ = 308560320.

The previous prime is 1253526679. The next prime is 1253526751. The reversal of 1253526690 is 966253521.

It is a super-2 number, since 2×1253526690² = 3142658325084712200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1606696 + ... + 1607475.

It is an arithmetic number, because the mean of its divisors is an integer number (101246418).

Almost surely, 2^1253526690 is an apocalyptic number.

1253526690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1253526690 is an abundant number, since it is smaller than the sum of its proper divisors (1986358686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1253526690 is a wasteful number, since it uses less digits than its factorization.

1253526690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3214194.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 1253526690 is about 35405.1788584665. The cubic root of 1253526690 is about 1078.2294635346.

The spelling of 1253526690 in words is "one billion, two hundred fifty-three million, five hundred twenty-six thousand, six hundred ninety".