1406551642 has 4 divisors (see below), whose sum is σ = 2109827466. Its totient is φ = 703275820.

The previous prime is 1406551609. The next prime is 1406551651. The reversal of 1406551642 is 2461556041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2461556041 = 7 ⋅351650863.

It can be written as a sum of positive squares in only one way, i.e., 1324304881 + 82246761 = 36391^2 + 9069^2 .

It is a super-2 number, since 2×1406551642² = 3956775043225792328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1406551598 and 1406551607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351637909 + ... + 351637912.

Almost surely, 2^1406551642 is an apocalyptic number.

1406551642 is a deficient number, since it is larger than the sum of its proper divisors (703275824).

1406551642 is an equidigital number, since it uses as much as digits as its factorization.

1406551642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703275823.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1406551642 is about 37504.0216776814. The cubic root of 1406551642 is about 1120.4312863874.

The spelling of 1406551642 in words is "one billion, four hundred six million, five hundred fifty-one thousand, six hundred forty-two".