1261028376 has 96 divisors (see below), whose sum is σ = 3517971600. Its totient is φ = 407773440.

The previous prime is 1261028371. The next prime is 1261028381. The reversal of 1261028376 is 6738201621.

1261028376 is a `hidden beast` number, since 1 + 2 + 610 + 2 + 8 + 37 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1261028371) and next prime (1261028381).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1261028376.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261028371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1520730 + ... + 1521558.

Almost surely, 2^1261028376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1261028376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1758985800).

1261028376 is an abundant number, since it is smaller than the sum of its proper divisors (2256943224).

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

1261028376 is a wasteful number, since it uses less digits than its factorization.

1261028376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449 (or 1442 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1261028376 is about 35510.9613499832. The cubic root of 1261028376 is about 1080.3760624532.

Adding to 1261028376 its reverse (6738201621), we get a palindrome (7999229997).

The spelling of 1261028376 in words is "one billion, two hundred sixty-one million, twenty-eight thousand, three hundred seventy-six".