1255440433742 has 64 divisors (see below), whose sum is σ = 2091162009600. Its totient is φ = 560532026880.

The previous prime is 1255440433729. The next prime is 1255440433747. The reversal of 1255440433742 is 2473340445521.

It is a happy number.

It is a super-2 number, since 2×1255440433742² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1255440433693 and 1255440433702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255440433747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 403806884 + ... + 403809992.

It is an arithmetic number, because the mean of its divisors is an integer number (32674406400).

Almost surely, 2^{1255440433742} is an apocalyptic number.

1255440433742 is a deficient number, since it is larger than the sum of its proper divisors (835721575858).

1255440433742 is a wasteful number, since it uses less digits than its factorization.

1255440433742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641.

The product of its (nonzero) digits is 1612800, while the sum is 44.

The spelling of 1255440433742 in words is "one trillion, two hundred fifty-five billion, four hundred forty million, four hundred thirty-three thousand, seven hundred forty-two".