1255151640 has 32 divisors (see below), whose sum is σ = 3765455280. Its totient is φ = 334707072.

The previous prime is 1255151593. The next prime is 1255151641. The reversal of 1255151640 is 461515521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1255151598 and 1255151607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255151641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5229679 + ... + 5229918.

Almost surely, 2^1255151640 is an apocalyptic number.

1255151640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255151640 is an abundant number, since it is smaller than the sum of its proper divisors (2510303640).

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

1255151640 is a wasteful number, since it uses less digits than its factorization.

1255151640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10459611 (or 10459607 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 1255151640 is about 35428.1193404335. The cubic root of 1255151640 is about 1078.6951662742.

The spelling of 1255151640 in words is "one billion, two hundred fifty-five million, one hundred fifty-one thousand, six hundred forty".