1402451561 has 8 divisors (see below), whose sum is σ = 1603372800. Its totient is φ = 1201673088.

The previous prime is 1402451537. The next prime is 1402451573. The reversal of 1402451561 is 1651542041.

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

It is a de Polignac number, because none of the positive numbers 2^k-1402451561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1402451521) 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, 13736 + ... + 54713.

It is an arithmetic number, because the mean of its divisors is an integer number (200421600).

Almost surely, 2^1402451561 is an apocalyptic number.

It is an amenable number.

1402451561 is a deficient number, since it is larger than the sum of its proper divisors (200921239).

1402451561 is an equidigital number, since it uses as much as digits as its factorization.

1402451561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71383.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1402451561 is about 37449.3199003667. The cubic root of 1402451561 is about 1119.3415456305.

The spelling of 1402451561 in words is "one billion, four hundred two million, four hundred fifty-one thousand, five hundred sixty-one".