1253358149 has 4 divisors (see below), whose sum is σ = 1253513664. Its totient is φ = 1253202636.

The previous prime is 1253358137. The next prime is 1253358157. The reversal of 1253358149 is 9418533521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9418533521 = 1637 ⋅5753533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253358149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253328149) 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, 64967 + ... + 82020.

It is an arithmetic number, because the mean of its divisors is an integer number (313378416).

Almost surely, 2^1253358149 is an apocalyptic number.

It is an amenable number.

1253358149 is a deficient number, since it is larger than the sum of its proper divisors (155515).

1253358149 is an equidigital number, since it uses as much as digits as its factorization.

1253358149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155514.

The product of its digits is 129600, while the sum is 41.

The square root of 1253358149 is about 35402.7986040652. The cubic root of 1253358149 is about 1078.1811374749.

The spelling of 1253358149 in words is "one billion, two hundred fifty-three million, three hundred fifty-eight thousand, one hundred forty-nine".