2545261402 has 4 divisors (see below), whose sum is σ = 3817892106. Its totient is φ = 1272630700.

The previous prime is 2545261399. The next prime is 2545261501. The reversal of 2545261402 is 2041625452.

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., 1729644921 + 815616481 = 41589^2 + 28559^2 .

It is a super-2 number, since 2×2545261402² = 12956711209022011208, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636315349 + ... + 636315352.

Almost surely, 2^2545261402 is an apocalyptic number.

2545261402 is a deficient number, since it is larger than the sum of its proper divisors (1272630704).

2545261402 is a wasteful number, since it uses less digits than its factorization.

2545261402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272630703.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 2545261402 is about 50450.5837627277. The cubic root of 2545261402 is about 1365.3504271884.

Adding to 2545261402 its reverse (2041625452), we get a palindrome (4586886854).

The spelling of 2545261402 in words is "two billion, five hundred forty-five million, two hundred sixty-one thousand, four hundred two".