1309157154 has 56 divisors (see below), whose sum is σ = 2950995072. Its totient is φ = 435387960.

The previous prime is 1309157149. The next prime is 1309157189. The reversal of 1309157154 is 4517519031.

It is a happy number.

1309157154 is a `hidden beast` number, since 1 + 30 + 9 + 1 + 571 + 54 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 919287 + ... + 920709.

Almost surely, 2^1309157154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1309157154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1475497536).

1309157154 is an abundant number, since it is smaller than the sum of its proper divisors (1641837918).

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

1309157154 is an equidigital number, since it uses as much as digits as its factorization.

1309157154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074 (or 2059 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The square root of 1309157154 is about 36182.2767940327. The cubic root of 1309157154 is about 1093.9494672117.

The spelling of 1309157154 in words is "one billion, three hundred nine million, one hundred fifty-seven thousand, one hundred fifty-four".