1259274240 has 408 divisors, whose sum is σ = 5070874848. Its totient is φ = 283115520.

The previous prime is 1259274239. The next prime is 1259274259. The reversal of 1259274240 is 424729521.

It is a super-2 number, since 2×1259274240² = 3171543223055155200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1259274195 and 1259274204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20643810 + ... + 20643870.

Almost surely, 2^1259274240 is an apocalyptic number.

1259274240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1259274240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2535437424).

1259274240 is an abundant number, since it is smaller than the sum of its proper divisors (3811600608).

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

1259274240 is an frugal number, since it uses more digits than its factorization.

1259274240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1259274240 is about 35486.2542401984. The cubic root of 1259274240 is about 1079.8748826251.

The spelling of 1259274240 in words is "one billion, two hundred fifty-nine million, two hundred seventy-four thousand, two hundred forty".