1255511402 has 4 divisors (see below), whose sum is σ = 1883267106. Its totient is φ = 627755700.

The previous prime is 1255511363. The next prime is 1255511441. The reversal of 1255511402 is 2041155521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2041155521 = 41 ⋅49784281.

It is an interprime number because it is at equal distance from previous prime (1255511363) and next prime (1255511441).

It can be written as a sum of positive squares in only one way, i.e., 1195154041 + 60357361 = 34571^2 + 7769^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313877849 + ... + 313877852.

Almost surely, 2^1255511402 is an apocalyptic number.

1255511402 is a deficient number, since it is larger than the sum of its proper divisors (627755704).

1255511402 is an equidigital number, since it uses as much as digits as its factorization.

1255511402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627755703.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1255511402 is about 35433.1963277376. The cubic root of 1255511402 is about 1078.7982179550.

Adding to 1255511402 its reverse (2041155521), we get a palindrome (3296666923).

The spelling of 1255511402 in words is "one billion, two hundred fifty-five million, five hundred eleven thousand, four hundred two".