1461249861 has 8 divisors (see below), whose sum is σ = 1954115904. Its totient is φ = 971275200.

The previous prime is 1461249851. The next prime is 1461249877. The reversal of 1461249861 is 1689421641.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1461249861 - 2⁷ = 1461249733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1461249851) 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, 721665 + ... + 723686.

It is an arithmetic number, because the mean of its divisors is an integer number (244264488).

Almost surely, 2^1461249861 is an apocalyptic number.

It is an amenable number.

1461249861 is a deficient number, since it is larger than the sum of its proper divisors (492866043).

1461249861 is a wasteful number, since it uses less digits than its factorization.

1461249861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445691.

The product of its digits is 82944, while the sum is 42.

The square root of 1461249861 is about 38226.2980289748. The cubic root of 1461249861 is about 1134.7708234651.

The spelling of 1461249861 in words is "one billion, four hundred sixty-one million, two hundred forty-nine thousand, eight hundred sixty-one".