1255399149 has 8 divisors (see below), whose sum is σ = 1681799392. Its totient is φ = 832965840.

The previous prime is 1255399097. The next prime is 1255399163. The reversal of 1255399149 is 9419935521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1255399149 - 2¹³ = 1255390957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1255399098 and 1255399107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255399549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990994 + ... + 992259.

It is an arithmetic number, because the mean of its divisors is an integer number (210224924).

Almost surely, 2^1255399149 is an apocalyptic number.

It is an amenable number.

1255399149 is a deficient number, since it is larger than the sum of its proper divisors (426400243).

1255399149 is a wasteful number, since it uses less digits than its factorization.

1255399149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983467.

The product of its digits is 437400, while the sum is 48.

The square root of 1255399149 is about 35431.6122833833. The cubic root of 1255399149 is about 1078.7660658653.

The spelling of 1255399149 in words is "one billion, two hundred fifty-five million, three hundred ninety-nine thousand, one hundred forty-nine".