1061555402 has 4 divisors (see below), whose sum is σ = 1592333106. Its totient is φ = 530777700.

The previous prime is 1061555399. The next prime is 1061555447. The reversal of 1061555402 is 2045551601.

It is a happy number.

1061555402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 819161641 + 242393761 = 28621^2 + 15569^2 .

It is a super-2 number, since 2×1061555402² = 2253799743030763208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265388849 + ... + 265388852.

Almost surely, 2^1061555402 is an apocalyptic number.

1061555402 is a deficient number, since it is larger than the sum of its proper divisors (530777704).

1061555402 is an equidigital number, since it uses as much as digits as its factorization.

1061555402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530777703.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 1061555402 is about 32581.5193322841. The cubic root of 1061555402 is about 1020.1112918422. Note that the first 3 decimals are identical.

The spelling of 1061555402 in words is "one billion, sixty-one million, five hundred fifty-five thousand, four hundred two".