1540260 has 72 divisors (see below), whose sum is σ = 4804800. Its totient is φ = 399168.

The previous prime is 1540249. The next prime is 1540289. The reversal of 1540260 is 620451.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam 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, 7641 + ... + 7839.

2^1540260 is an apocalyptic number.

1540260 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 1540260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2402400).

1540260 is an abundant number, since it is smaller than the sum of its proper divisors (3264540).

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

1540260 is a wasteful number, since it uses less digits than its factorization.

1540260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1540260 is about 1241.0721171632. The cubic root of 1540260 is about 115.4865335399.

It can be divided in two parts, 15402 and 60, that multiplied together give a triangular number (924120 = T₁₃₅₉).

The spelling of 1540260 in words is "one million, five hundred forty thousand, two hundred sixty".