1255421528 has 8 divisors (see below), whose sum is σ = 2353915380. Its totient is φ = 627710760.

The previous prime is 1255421521. The next prime is 1255421537. The reversal of 1255421528 is 8251245521.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255421521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78463838 + ... + 78463853.

Almost surely, 2^1255421528 is an apocalyptic number.

It is an amenable number.

1255421528 is a deficient number, since it is larger than the sum of its proper divisors (1098493852).

1255421528 is a wasteful number, since it uses less digits than its factorization.

1255421528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156927697 (or 156927693 counting only the distinct ones).

The product of its digits is 32000, while the sum is 35.

The square root of 1255421528 is about 35431.9280875314. The cubic root of 1255421528 is about 1078.7724759282.

The spelling of 1255421528 in words is "one billion, two hundred fifty-five million, four hundred twenty-one thousand, five hundred twenty-eight".