1255400554 has 4 divisors (see below), whose sum is σ = 1883100834. Its totient is φ = 627700276.

The previous prime is 1255400533. The next prime is 1255400579. The reversal of 1255400554 is 4550045521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4550045521 = 7 ⋅650006503.

It can be written as a sum of positive squares in only one way, i.e., 659308329 + 596092225 = 25677^2 + 24415^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313850137 + ... + 313850140.

Almost surely, 2^1255400554 is an apocalyptic number.

1255400554 is a deficient number, since it is larger than the sum of its proper divisors (627700280).

1255400554 is an equidigital number, since it uses as much as digits as its factorization.

1255400554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627700279.

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 1255400554 is about 35431.6321103051. The cubic root of 1255400554 is about 1078.7664683046.

The spelling of 1255400554 in words is "one billion, two hundred fifty-five million, four hundred thousand, five hundred fifty-four".