261460740 has 24 divisors (see below), whose sum is σ = 732090240. Its totient is φ = 69722848.

The previous prime is 261460739. The next prime is 261460741. The reversal of 261460740 is 47064162.

It is an interprime number because it is at equal distance from previous prime (261460739) and next prime (261460741).

It is a super-2 number, since 2×261460740² = 136723437122695200, which contains 22 as substring.

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 = 261460698 and 261460707.

It is not an unprimeable number, because it can be changed into a prime (261460741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2178780 + ... + 2178899.

It is an arithmetic number, because the mean of its divisors is an integer number (30503760).

Almost surely, 2^261460740 is an apocalyptic number.

261460740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261460740 is an abundant number, since it is smaller than the sum of its proper divisors (470629500).

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

261460740 is a wasteful number, since it uses less digits than its factorization.

261460740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357691 (or 4357689 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 261460740 is about 16169.7476789219. The cubic root of 261460740 is about 639.4434777961.

The spelling of 261460740 in words is "two hundred sixty-one million, four hundred sixty thousand, seven hundred forty".