1255421154 has 32 divisors (see below), whose sum is σ = 2719120320. Its totient is φ = 384121152.

The previous prime is 1255421147. The next prime is 1255421177. The reversal of 1255421154 is 4511245521.

It is a Curzon number.

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, 30997 + ... + 58920.

It is an arithmetic number, because the mean of its divisors is an integer number (84972510).

Almost surely, 2^1255421154 is an apocalyptic number.

1255421154 is an abundant number, since it is smaller than the sum of its proper divisors (1463699166).

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

1255421154 is a wasteful number, since it uses less digits than its factorization.

1255421154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90114.

The product of its digits is 8000, while the sum is 30.

The square root of 1255421154 is about 35431.9228098053. The cubic root of 1255421154 is about 1078.7723688032.

Adding to 1255421154 its reverse (4511245521), we get a palindrome (5766666675).

The spelling of 1255421154 in words is "one billion, two hundred fifty-five million, four hundred twenty-one thousand, one hundred fifty-four".